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Hobbies & Science : Society & Culture & Entertainment
How to Spot Counterfeit Chinese Coins
Chinese coins date back as far as the Liao Dynasty, which ruled between 907 and 1125. Coins were often issued to commemorate a ruler, a historical event, or scenes and themes that had cultural significance. China continues to issue coins, including commemorative coins for events such as the 2008 Oly
How to Restore Clock Faces
If you have an heirloom clock that you value dearly, it is important that you keep it with you for as long as possible. If your clock acquired some damages on the face, do not lose hope. You can fix cracks, discoloration, peeling, fading or holes on your clock. You can save a lot of money by doing t
Rack-and-Pinion: Gear Ratio
Gear ratio is the relationship between the number of teeth on each gear. This ratio shows the number of revolutions each gear makes. Rack-and-pinion gear ratio is slightly different in that it measures the distance the rack travels.
Instructions for a Monkey Catapult
The Flying Monkey Catapult is a toy that will please those who want to brighten up their drab office environment or normal living room with flying monkeys right out of the "Wizard of Oz." It is a small plastic toy that flings small fez wearing plastic monkeys across the room with just one pull on th
Wildfires & Endangered Animals
Wildfires are a natural hazard that can pose danger to both humans and animals. When it comes to endangered animals, these creatures are at an elevated level of risk already. Wildfires can threaten not only the animals' well-being, but also the existence of a species.
Silversmithing Tips
Silver is a beautiful and versatile medium for jewelry with finishes ranging from a highly polished, sophisticated look to a casual patina. With some basic tools and techniques, you can set up a silversmithing studio and begin crafting your own unique pieces of wearable art.
How to Find Agate Rocks
Agates are found across the United States and in many other countries. They are in the chalcedony family of cryptocrystalline quartz. These beautiful rocks come in every color, shape and size, and can be polished as stones or cut into thin strips for decorative purposes. Some agates are used in jewe
How to Analyze Pollen in a Soil Sample
The study and analysis of pollen, otherwise known as palynology, is becoming increasingly popular in the field of forensics. Forensic palynology is used to help match suspects to crimes or victims through the analysis of pollen evidence from geographical regions relevant to the crime scene. Because
How to Make a Beach Glass Bracelet
Beach glass, or sea glass, is the name given to the surprisingly beautiful results of seaside littering. Shards of broken glass are weathered by salt and sand over time into smooth, frosted pieces that make beautiful jewelry. To create a bracelet from pieces of beach glass, cap and join each piece i
How Would Salt Affect Yeast?
Yeast added to other ingredients during the bread-making process, ferments, producing a gas that causes the bread to rise. Besides rising the dough, fermentation enhances gluten development, improves the texture and flavor of the finished product, and extends the shelf-life of the finished loaf of b
How to Make Your Own Solar Fuel Cells
Solar cells are used to convert energy from the sun into electricity. Commercial solar cells are made from highly processed silicon, but you can make your own low-tech ones right in your kitchen out of copper flashing. The flashing is used to create cuprous oxide, a material that has a photoelectric
How to Apply Bottle Labels
Making beverages, such as wine, mead and beer, is a very popular hobby today. There is so much freedom to making your own beverages---from picking your own ingredients and bottles to designing your own label. One of the less tricky parts to making your own beverage is applying the label without mak
How to Calculate Drawdown at a Distance From a Pumped Well
If you have a pumped well, you may need to know the drawdown, which is the distance the water level goes down when the pump is running versus the static level when it is not. You need to know these two measurements. One way to do so is by manually measuring them. If you are at a distance from the we
How to Build Your Own Mechanical Clock
Making a clock can be as simple or as complex as you choose. Ready-made clock bases, movements, hands, numbering and faces (with and without numbering) are available for purchase in most large craft and hobby stores. Wood hobbyists may choose to make their own base, or use wood-burning tools to embe
How to Build a Good Macro Beatdown Deck
Much of Yu-Gi-Oh! strategy consists of building successful decks that include cards that work well in conjunction with each other to defeat your opponent. Choosing a deck theme or type can help you develop such a deck. A macro beatdown deck is one which is designed to remove as many cards from play
How to Install Wheels on a Pinewood Derby Car
The Pinewood Derby has been a tradition in the Cub Scouts since its introduction in 1953, according to the National Scouting Museum. Since that time, the design of Pinewood Derby cars have undergone subtle changes, all geared toward getting the tiniest extra bursts of speed while adhering to the str
How to Find the Volume of a Square Based Pyramid
For thousands of years, square pyramids have formed the basic structure of important buildings. The Egyptian pyramids at Giza, the Aztec temples and the modern glass visitor entrance to the Louvre Museum in France are all square pyramids. The volume of a square-based pyramid is a function of the ar
Silver Mining Extraction Methods
Extracting silver from ore containing the metal starts with open pit or underground mines. Miners extract the silver-bearing ore, crush and grind it and separate it into parts containing different metals by flotation. Silver exists in mineral form as a sulfide, along with high concentrations of the
Software for a Cricut Cutter
Cricut is the company name for a line of personal electronic cutters. Craft enthusiasts -- including scrapbookers, card makers and home designers -- commonly use Cricut cutters to create intricate designs such as letters, numbers and shapes. At one time, there were multiple third-party companies mar