The Arch-Mage believes that Lena Dalvel, Tedras Relvi, and Hadmar the Thin-Boned will emerge as great leaders in the Ebonheart Pact. He wants me to help them pass their initiation tests so that his visions have a chance to come true. Objective: Assist Lena Dalvel. Objective Hint: Use the Wand to Find the Lost Amulet.Clean your large rocks using a hosepipe with a spray attachment and spray them down to remove any algae build-up. Remove surface debris as often as you can, reducing the amount of organic material that floats to the bottom of the pond. Use a pond vacuum to clean up debris and sludge building up around and on the rocks on the bottom of your …Its use was despised by Luddite rebels because, like the satnav, it made their expertise unnecessary. The digital spreadsheet is an example of “skill-biased technological change” that helps ...Incredibly, he only painted about three works of the lily pond up to 1897, This work, from 1899, is exquisite in its composition of background trees, weeping willow, and the bridge, which underwent many alterations up to 1910. The pond here is literally obliterated by vegetation and lilies. It is composed of short brushstrokes - a familiar ...The Water-Lily Pond (1899) by Claude Monet The National Gallery, London. It wasn't actually a painting that Monet deemed his ‘greatest work of art’ but the beautiful gardens he created at his home in Giverny. In his later years, it became his sole subject. The bridge, which Monet designed himself, shows the influence of Japanese art on his ...CALVERT INTERNATIONAL RESPONSIBLE INDEX FUND CLASS A- Performance charts including intraday, historical charts and prices and keydata. Indices Commodities Currencies StocksClose the nozzle when the hose is filled up with water. Try to keep it vertical and steady to keep the water inside. Now find a place with a lower elevation than the pond. Set the nozzle there on the ground and place the other side into the pond. Use the brick to hold the tube underwater.Ponds with a range of features tend to host a greater variety of wildlife. Features can include sloping 'beaches' and muddy margins, shallow open water, deeper sections, vegetation around the edges and areas with overhanging trees. But even tiny freshwater ponds will attract some wildlife. Ponds support a wide range of wildlife - from creatures ...We have customers with large ponds used for swimming, fishing, and ice skating, in addition to customers with decorative water gardens containing koi, waterfalls, and ornamental plants. Products carrying The Pond Guy name are designed, developed, and tested in our labs to ensure high-quality products that exceed industry standards.If there are 44 fish in the pond and the experimental probability of pink salmon is 60%, we multiply 0.06 by 44 to get 26.4 which can be rounded to 26 pink salmon. If the experimental probability of both, yellowfin tuna and bluegill is 20% each and there are 44 fish in that very pond, we multiply both of the probabilities with 44 to get 8.6 ...Physics questions and answers. A puck resting on a frozen pond is given an initial speed vi in the +x-direction. The coefficient of kinetic friction between the ice and the puck is μk. (a) Write an expression for the acceleration of the puck as it slides across the frozen pond. (Use the following as necessary: μk and g.The best time to apply barley straw in your pond is before algae emerge in your pond, around fall or early spring. If the water is cold, it may take 6-8 weeks for the straw to take effect. In contrast, adding them to warm water above 70°F will make them effective in 1-2 weeks.The Pond: Directed by Petar Pasic. With Marco Canadea, Paul Leonard Murray, Aleksandar Papajic, Leslie Soo. Anthropology professor was kicked out from his university for claiming to be on the threshold of an apocalyptic discovery.Top up ponds with fish if the water level drops significantly. Evaporation in hot or windy weather can reduce oxygenation, causing problems for fish. Ideally use rainwater from a butt, as the nutrients in tap water encourage algae. If you must use mains water, warm it in the sun first and add in small quantities, to avoid a sudden temperature drop.CDC - Blogs - NIOSH Science Blog – The Unique Occupational Environment of the Home Healthcare Worker - Patient care is expanding beyond the walls of healthcare organizations. Impro...The Fish Pond is a type of farm building purchasable from Robin at the Carpenter's Shop. It takes two days to build and occupies a 5x5 tile space. The following can be placed in a Fish Pond: The following cannot be placed in a Fish Pond: Fish in a Fish Pond have a chance to produce Roe or certain other items.Physics. Physics questions and answers. пk: A stone resting on a frozen pond is given an initial speed v; in the +x-direction. The coefficient of kinetic friction between the ice and the stone is (a) Write an expression for the acceleration of the stone as it slides across the frozen pond. (Use the following as necessary: Hk and g.Gayle Hallgren-Rezac is co-author of WORK THE POND! Use the Power of Positive Networking to Leap Forward in Work and Life which she wrote with Darcy Rezac and Judy Thomson. WORK THE POND! has been called the "connectors handbook" by Town & Country magazine. It has been translated and published in China, Russia and Korea.Close the nozzle when the hose is filled up with water. Try to keep it vertical and steady to keep the water inside. Now find a place with a lower elevation than the pond. Set the nozzle there on the ground and place the other side into the pond. Use the brick to hold the tube underwater.Choosing which type of pond pump to use primarily depends on your preferred setup and pond size. In terms of functionality, there's hardly any difference to find between the two water pumps. Both water pumps also follow a similar energy consumption dependent on their wattage. However, it's worth noting that submersible pond water pumps are ...2) Atlantic Water Gardens Pond Netting. Atlantic Water Gardens PN2020 Heavy-Duty Pond Net Stakes, 20-Feet by 20-Feet. Protect fish from predators and keeps leaves out of ponds. UV-resistant polypropylene construction. 1/2" x 1/2" opening size keeps debris out while allowing sunlight and fresh air to enter.Laura Metz. Last Modified Date: February 04, 2024. "Across the pond" is an idiom that typically refers to the United Kingdom and the United States being on opposite sides of the Atlantic Ocean. This expression is an understatement, often used as a humorous reference to the approximately 3,500 miles (5,600 km) between the coasts of each country.Keep Up With Life At The Pond. Radio stations! You have been asking "When are we going to see new pond episodes?" Cost has always been the issues. So I've started a gofundme to raise money to do more Pond audio. The link is here - Pond Go Fund Me. Any questions, feel free to contact me: [email protected]. Here is the Life at the Pond ...Product Details. Airmax Ultra Pondweed Defense Aquatic Herbicide works on pond weeds including submerged, floating and emergent weeds. This pond herbicide may be used for short term control of Duckweed in slow moving water. Use pond weed control solution with Treatment Booster Plus all season-long on actively growing plants for best results.The bottom line is that if we are going to continue to benefit from the use of our natural resources, we must be willing to act to preserve them. With all the doom and gloom involving the environment, Beyond the Pond is a breath of fresh air - it is a positive communications initiative involving diverse collaborators that helps us to emphasize ...Use two or three layers about an inch thick. Poly fiber filter pads - These can be placed directly onto the bottom of your pond, or underneath GAC media. You can leave them there permanently as they do not absorb detritus and will catch larger objects before they settle on top of your other filter system components.If the pond has already been filled with water, agricultural lime can be applied as a powder or pre-mixed slurry. To spread the lime as evenly as possible, use a small motorboat or barge with a platform and a water pump. Slowly make your way around the pond while using the water to wash the lime off of the platform. Ponds in South Carolina. Four types of ponds are common in South Carolina; these include aquaculture, irrigation, recreational, and stormwater ponds. Pond type influences the practices used to manage water quality, water quantity, and aquatic biodiversity. This article provides introductory information to producers, landowners, municipalities ... We would like to show you a description here but the site won’t allow us. Fill several clear jars of equal size with turbid water from the pond, and mark each one to differentiate it. Take one tablespoon of the treated clear water and add it to the first jar of pond water. Add two tablespoons of the treated clear water to the second. Repeat with an increasing number of tablespoons in the other pond water jars.So this is my guide I’ve written after building and maintaining many ponds in my own backyard. Hopefully this guide will also help people not in Australia who also want to …Add antifreeze: Use marine antifreeze to protect the engine and plumbing system from freezing. Follow the manufacturer’s instructions for the correct amount and method of application. Protect the engine: If your small pond boat has an engine, follow the manufacturer’s guidelines for winterizing it. This may involve changing the oil, fogging ... Americana music, lyrics, and videos from Phoenixville, PA on ReverbNation. Mar 4, 2024 · While pond air pumps—commonly known as compressors—on aeration systems are safe to use year-round, other pumps might get damaged in wintertime. Generally, any pump that moves water should be removed before the first freeze. This includes waterfall pumps, water feature pumps, and fountain pumps. To be safe, double-check your manual’s ... If using underwater sealant: Step 1: Simply clean the surface of the liner where the tear is. Step 2: Apply the sealer directly to the surface of the tear. Step 3: Allow curing for 24 hours. *Note: you do not need to drain your pond to use underwater sealant. It can be applied and will cure under the water.Spring Start-Up. Over the course of a year, your pond will accumulate debris and organics such as leaves, twigs, grass clippings and fish waste. Although your filtration system may remove some of this debris, the rest will break down into muck and sludge, which will release nutrients into the water and may cause algae and water clarity issues.Step 1: Unpack Kit & Mark Area. Start by deciding on the location to build your pond and unpacking your gear. Use a rope or garden hose to help you visualize your pond layout. Once you decide on a shape you like, draw your lines with a can of marking paint and note where your waterfall will be.Fill several clear jars of equal size with turbid water from the pond, and mark each one to differentiate it. Take one tablespoon of the treated clear water and add it to the first jar of pond water. Add two tablespoons of the treated clear water to the second. Repeat with an increasing number of tablespoons in the other pond water jars.The Pond Guy ClearVac Pond Vacuum can be used in any Koi pond, water garden, or water feature to perform regular maintenance. The ClearVac is designed to remove sludge/muck, algae, and debris up to 3/8". The vacuum can be used on a regular basis without having to remove the fish from the pond.Submersible pond pumps will vary in price substantially. Obviously the more water that is moved the more expensive the pump. Also low volt will cost more than 240volt and the more energy efficient the more expensive also. A good quality pump for a 3m x 3m pond will cost between $150-$300.7 – Keep the Pond Accessible. Keep your pond accessible for the ducks all year round. Use a heater or de-icer to prevent the water from freezing during winter. You can also use an aeration system to create water turbulence, making the water ice-free and allowing the winter ducks to browse for food.How to build a fish pond using pond liners. If you are using a liner as the base for your pond then lay this over the hole, with at least 40cm overlap at the sides. Push the liner into the hole, weighing down the edges with rocks to keep it even, and arrange the liner to fill the hole and make good contact with the sides. ...Use your knife to harvest at least 4, then head back up to the surface. Analyze the strands if you aren't at Brain Level 4 yet. Swim over the air bubbles floating around in the pond to replenish ...Wood or driftwood are not the best things to put in your pond. The organic material can decompose and turn into sludge that will clog up your pump, filter, and pipes. This could lead to a number of problems including an overflow of the pond and dirty water in it which is bad for fish health. Wood also does not provide any benefits such as ...Aug 3, 2023 · Pond fertilizer is a product designed to introduce nutrients into a fishing pond (or any pond) to boost the productivity of the ecosystem. The primary purpose of using fertilizer in a fishing pond is to increase the amount of available food for fish. Here’s how it works: Pond fertilizers are typically rich in phosphorus and nitrogen ... Installing pond rocks. Handling rocks is a laborious job with lots of heavy lifting and re-positioning the rocks to get the right look. Wear thick garden gloves and use a garden cart to help move the rocks around if you haven't got anyone to help you.. Flat rocks can be placed around the edge of the pond to create an overhanging shelf.1. Depth: A lake is generally deeper than a pond. 2. Shape: A lake also tends to be more of an oval shape with peninsulas, while ponds usually have rounded edges. 3. Nature: Lakes are mostly freshwater but can contain some amounts of salt water, while ponds are freshwater. Lake. Pond. Depth.Step 1. How to make a wildlife pond - digging a hole. Use a hose to create the shape of your pond on the ground and then dig. Aim for a depth of 45-60cm in the centre, graduating to 30cm near the edge. Keep the subsoil to one side to use later. Check the sides are level using a piece of wood and spirit level.There are several benefits to having rocks in your koi pond, whether you decide to cover the floor of your pond with them, place them around the edges, or place a few in strategic positions. Rocks add aesthetic value to your koi pond, and they can also offer a range of added benefits not only for your pond’s ecosystem but also for your koi fish.Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.Benchmark Co. analyst Christopher Kuhn reiterated a Buy rating on XPO (XPO – Research Report) today and set a price target of $44.00. The ... Benchmark Co. analyst Christophe...One of the fastest ways to kill the duckweeds is to use Reward or Weedtrine-D. Reward and Weedtrine-D are the trade name and the chemical name is Diquat. The action is fast as duckweed absorbs it quickly. The rate of application is 1 to 2 gallons per surface acre of 2L or as per manufacturer recommendation.Empty the water, then clean the pond liner or hard mold with a bleach and water solution. Rinse the pond thoroughly, then add fresh water. For the safety of plants and fish, use a chlorine remover to detoxify the water before adding pond life. You can use a bleach and water solution to clean statues, figurines and plant containers if you remove ... Ponds in South Carolina. Four types of ponds are common in South Carolina; these include aquaculture, irrigation, recreational, and stormwater ponds. Pond type influences the practices used to manage water quality, water quantity, and aquatic biodiversity. This article provides introductory information to producers, landowners, municipalities ... Submersible pond pumps will vary in price substantially. Obviously the more water that is moved the more expensive the pump. Also low volt will cost more than 240volt and the more energy efficient the more expensive also. A good quality pump for a 3m x 3m pond will cost between $150-$300.The bottom line is that if we are going to continue to benefit from the use of our natural resources, we must be willing to act to preserve them. With all the doom and gloom involving the environment, Beyond the Pond is a breath of fresh air - it is a positive communications initiative involving diverse collaborators that helps us to emphasize ...Add antifreeze: Use marine antifreeze to protect the engine and plumbing system from freezing. Follow the manufacturer’s instructions for the correct amount and method of application. Protect the engine: If your small pond boat has an engine, follow the manufacturer’s guidelines for winterizing it. This may involve changing the oil, fogging ...The Aquaplancton Solar Powered Pump Kit is one of the most powerful solar pond pumps on the market! Its twin 25-watt solar panels (50 watts total!) can pump out a max of 898 GPH! The kit includes a 16ft hose to connect to your pond's filter or water feature and another 16ft of electrical wire from your pump to your solar panels.You may need a heater for your koi pond, depending on where you live. You will only need to use a heater if your city experiences very cold winters where the pond can freeze over. If your city has mild winters, using a heater is optional. Koi are cold-water fish, so a heater isn’t needed year-round. If you want to keep your pond warm, you may ...Acclimating Fish. After stocking your pond, acclimating fish is simple. Place the transportation bag in a shaded area of the pond and let float for 15-20 minutes. This allows fish to slowly adjust to water temperatures in your pond. Next, open the bag and let the fish swim out on their own.Use lights to show off your pond. Lights can be used to highlight different features of your pond and create a beautiful nighttime display. Submersible lights are a great option for ponds. To save on energy, try using solar-powered lights. A Japanese tea garden style pond. For a tranquil and serene pond, try using a Japanese tea garden style.News. Jaw-dropping images win big in the World Nature Photography Awards 2024. By Kalum Carter. published 28 March 2024. The best wildlife and nature photography in the …Take the area covered by your pond (area = π × (2 m)² / 4 = 3.141 m²). Multiply this by your pond's depth to obtain its volume (volume = 3.141 m² × 0.6 m = 1.884 m³). Finally, multiply this volume by 264.172 to get the volume in gallons (volume in gallons = 1.884 m³ × 264.172 gallons/m³ = 498 gallons).Common issues with used UD trucks include wheel-end problems, coolant leaks and blockages and fan transmission issues. The automatic systems included in these models do give advanc...Gayle Hallgren-Rezac is co-author of WORK THE POND! Use the Power of Positive Networking to Leap Forward in Work and Life which she wrote with Darcy Rezac and Judy Thomson. WORK THE POND! has been called the "connectors handbook" by Town & Country magazine. It has been translated and published in China, Russia and … The pond vacuum will pick up debris, but it is not a filter. Returning the water into the pond will also return fine particles like sludge, muck, and water. Expect about a 10-25% water loss while cleaning the pond. Once you have selected your nozzle, turn the power switch to the on position and submerge the suction hose in the water. Lava Eel. Blobfish. Rainbow Trout. Ice Pip. Spook Fish. Super Cucumber. With the 1.4 Stardew Valley update, we were introduced to the fish pond. This building can be placed on your farm to raise a variety of fish. There are dozens of fish in the game, so it can be hard to decide which fish should be placed in the pond.r/ThePDude: Official subreddit of ThePornDude. The Real Housewives of Atlanta; The Bachelor; Sister Wives; 90 Day Fiance; Wife Swap5) Chara Algae. Muskgrass is a type of algae that can benefit ponds. Photo by Mnolf, CC BY-SA 3.0, via Wikimedia Commons. Chara, or muskgrass, also belongs to the green algae family. This type of alga is often mistaken for a plant because they possess structures that look quite similar to leaves and stems.Jan 12, 2024 · Monitoring the Pond. After every storm, you’ll need to monitor the surroundings of the retention pond for possible cracks and soil erosion. Regular monitoring will help you take the necessary corrective measures. Pollutants are washed into the pond along with stormwater, so you should also watch out for any significant change in the quality ... Pond Care Package Eliminates Guesswork. Achieve Crystal Clear Water, Reduce Muck. Includes FREE Bottle of InstaFix Algae Control. $89.99 - $139.99. Cannot Ship to AK, HI, PR. The Pond Guy DefensePAC 1000. Select Package. 200174 - DefensePAC 1000 w/FREE InstaFix $89.99. 200175 - DefensePAC 2000 w/FREE InstaFix $139.99.The Aquaplancton Solar Powered Pump Kit is one of the most powerful solar pond pumps on the market! Its twin 25-watt solar panels (50 watts total!) can pump out a max of 898 GPH! The kit includes a 16ft hose to connect to your pond's filter or water feature and another 16ft of electrical wire from your pump to your solar panels.This video answers the following questions: how to build the fish pond? How to get tons of fish food fast without exploit? What's the best method to get xun...Study with Quizlet and memorize flashcards containing terms like Niche, Two species of turtles in a pond use the same species of fish as their food. The struggle of the turtles to survive as they use the same limited resource is called _____., Which of the following could possibly decrease a population over time? and more.In this guide, we'll cover the type of pond liner material that works best, walk through a step-by-step process to calculate liner size using our pond liner calculator, and run through some important reminders and next steps as you construct your pond. The Best Pond Liner Material (EPDM) In this guide, we'll cover the type of pond liner material that works best, walk through a step-by-step process to calculate liner size using our pond liner calculator, and run through some important reminders and next steps as you construct your pond. The Best Pond Liner Material (EPDM) Retention ponds are bodies of water that are used to store and release water over time, either naturally or artificially. They can be used to regulate water flow, reduce flooding and erosion, and filter pollutants from stormwater runoff. There are several types of retention ponds, each with its own purpose and design.Claude Monet, Reflections of Clouds on the Water-Lily Pond,c.1920, 200 × 1276 cm (78.74 × 502.36 in), oil on canvas, Museum of Modern Art, New York City. Water Lilies ( French: Nymphéas [nɛ̃.fe.a]) is a series of approximately 250 oil paintings by French Impressionist Claude Monet (1840–1926). The paintings depict his flower garden at ...Call 866-766-3435. We do our best to avoid errors in pricing and products, but we reserve the right to correct them. Visit The Pond Guy for a wide selection of lake and farm pond algae control, pond fountains, pond aeration systems, and lake muck removal products.Pond life: the animals that rely on this habitat. Some creatures spend their whole lives submerged in a pond, such as freshwater hoglice that have gills to aid their aquatic lifestyle. But ponds are typically low in dissolved oxygen, so many freshwater insects breathe air and can fly between ponds. Water scorpions use their tails like snorkels ...With rooted pond weeds, you will need to use a weed cutter and then rake out the cut pieces. In some cases, especially with a shallow pond, you may be able to remove the entire plant, including the root system, by hand. Keep in mind, either with raking, cutting or removing by hand, fragments left behind will cause new pond weeds to accumulate.You may need a heater for your koi pond, depending on where you live. You will only need to use a heater if your city experiences very cold winters where the pond can freeze over. If your city has mild winters, using a heater is optional. Koi are cold-water fish, so a heater isn’t needed year-round. If you want to keep your pond warm, you may ...5) Chara Algae. Muskgrass is a type of algae that can benefit ponds. Photo by Mnolf, CC BY-SA 3.0, via Wikimedia Commons. Chara, or muskgrass, also belongs to the green algae family. This type of alga is often mistaken for a plant because they possess structures that look quite similar to leaves and stems.Water Testing: Use water testing kits to monitor nutrient levels, especially nitrates and phosphates, as elevated levels can contribute to bad algae growth. Managing and controlling bad algae growth in garden ponds can be achieved through various strategies: Manual Removal: Use a pond net or rake to physically remove excess algae from the pond ...The area of Mr. Ling's semicircular pond is approximately 39.27 square feet. Hence 39 or 39.27 feet² is correct answer. Finding Area of Mr. Ling's Semicircular Pond: A Step-by-Step Guide Mr. Ling's decision to add semicircular pond to his backyard is wonderful! To determine pond's area, we can follow these steps: 1) Define the radius:Algaecides for Ponds & Lakes. You can finally put a stop to troublesome algae with algaecides for ponds and lakes, including both granular and liquid options. Our pond algaecides help combat algae and chara, designed to quickly eliminate active blooms and clear up the water following regular applications. Free Shipping over $99* Most orders ...
Pond owners who have hardy breeds of goldfish or koi in their pond may not need a pond heater during the winter–especially if they live in a climate with mild winters. Some fish are naturally tolerant of cold conditions and the occasional freeze–as long as there is ample oxygen available. That being said, we recommend you install a de-icer ... . Kanokkorn jaicheun nude
Pond Fishing . Tedras can be found beside a pond to the right of Shad Astula's entrance. He has been tasked with fishing from the pond, although the pond is quite devoid of any fish. ... He has created a totem to ascend the rock, but doesn't want to actually use it due to a fear of heights. Activate the totem while facing the rock to be ...Video and audio adventures that apply solid, biblically-based truths to life lessons, building character in your kids and providing more than a splash of humor along the way from a crew building lifelong friendships at The Pond. It's hours of family-safe entertainment with this five-video series and 60+ audio episodes.You may need a heater for your koi pond, depending on where you live. You will only need to use a heater if your city experiences very cold winters where the pond can freeze over. If your city has mild winters, using a heater is optional. Koi are cold-water fish, so a heater isn’t needed year-round. If you want to keep your pond warm, you may ... Ask The Pond Digger. Eric, The Pond Digger, has been answering pond questions for the community for years. Recently these questions have been addressed on YouTube for your viewing pleasure! Check back for more answers to your burning questions! To ask The Pond Digger a question: Simply put #asktheponddigger on Facebook, Instagram, or Twitter ... Ponds have a life cycle. A long life is best achieved by limiting the inputs of nutrients to the pond. Capture sediment before it enters the pond, limit the use of fertilizers within the …Keep Up With Life At The Pond. Radio stations! You have been asking "When are we going to see new pond episodes?" Cost has always been the issues. So I've started a gofundme to raise money to do more Pond audio. The link is here - Pond Go Fund Me. Any questions, feel free to contact me: [email protected]. Here is the Life at the Pond ... We would like to show you a description here but the site won’t allow us. Having a list of words with a specific letter, or combination of letters, could be what you need to decide your next move and gain the advantage over your opponent. While you're at it, don't forget to look at words that start with UDE and words that end with UDE. YourDictionary's Word Finder provides you with words to focus on, each with ...Floating Weeds. Generally found in shallow water, the stem & root system of a floating weed may start at the pond's bottom, although not always. Foliage will be seen floating on the water's surface. If left untreated, they can completely cover cutting off light and oxygen to the fish below.Public domain. To discover how barley works as an algae control method, we need to dive into the details and take a look at each step of the decomposition process as it enters your pond: 1) Barley straw, or barley extract, is placed in the pond and slowly begins to decompose. During decomposition the cellular structure of the barley begins to ...The Fish Pond is a type of farm building purchasable from Robin at the Carpenter's Shop.It takes two days to build and occupies a 5x5 tile space. A fish pond can hold and raise most types of fish, including Night Market fish, Crab Pot fish and beach forageables such as Sea Urchins and Coral.The fish produce Roe and random items. The only fish which cannot …The PondoVac 4 by OASE is one of the most sturdy and versatile pond vacuums on the market. Perhaps the PondoVac 4's best selling feature is its dual chambers which allow it to vacuum and drain at the same time for continuous use. Other pond vacuums with single chambers can only vacuum or drain one at a time which makes the job take much longer.Its use was despised by Luddite rebels because, like the satnav, it made their expertise unnecessary. The digital spreadsheet is an example of "skill-biased technological change" that helps ....