User:Elisestudent65/My Sandbox

adding to Mammal Eggs- There are three mammals that lay eggs. The platypus, the the short-beaked echidna, and the long-beaked echidna, the echidnas are also known as the spiny anteaters.

The Advantages of Adding Eggshells to Your Garden Using your empty eggshells in your garden soil is a good way of recycling. The crushed eggshells add healthy and valuable nutrients to your soil. They have a high source of calcium, which is needed for a nutritious cell growth in all types of plants. This is important for fast growing plants because they can go through the source of calcium in the soil quickly. To use the eggshells, first wash them. Then crush them until they are in very small chips. Leaving egg shells whole or in large pieces will take much longer for them to breakdown and be of value to the plants in your garden.

How to Clear Your Drain with Eggshells With crushed eggshells, you can clear your drain and pipes. To do this follow these three steps. 1) Crush the eggshell as well as you can. One way to crush the shells is to place them in a plastic bag and then pound them with a knife handle or spoon. 2) Place the shells into the drain basket of your sink or tub. 3) Allow the shells to stay in place as the normal use of the sink or tub will eventually send the shells into your pipes.

Jone's Falls Dam
Jone's Falls Dam, built in 1831 and completed in 1832, is a dam located in Ontario, Canada that was built to tame the mile long series of rapids and falls that runs through the Jone's Falls.

History

The dam was built by John Redpath and Thomas McKay. When completed in 1832, the Jones Falls dam was the largest dam in North America, a big accomplishment in engineering. In order to keep the water in control during construction, two sluices, artificial channels for conducting water, were kept opened in the dam. The first was near the base of the dam on its east side. A second sluice was put in on the west side of the dam, about 20 feet (6 m) above the base. To make the switch from the lower to upper sluice, the outlet of Sand Lake was blocked off. It is called the ‘Whispering Dam’ because if a person stands at one edge of the dam, near the top, and another person stands at the other edge, the two can communicate quite well over a distance of almost 360 feet. This is because the shape of the dam, the Roman arch, and the use of sandstone as the dam rather than mortar. This abnormal quality was not planned, just a delightful result of the design.

Statistics

At Jones Falls, boats rise and fall almost 60 feet due to a set of four canal locks, and a dam, nicknamed the Whispering Dam, which holds back the 60 feet of water. The dam is approximately 360 feet long, 60 feet high, and 27 feet thick at the base of the dam. It was built with large sandstone blocks that was hauled by horse-teams to the site. The blocks were shaped on site. No mortar or cement was used in this dam. The blocks were set in a giant arch, with the pressure of the water behind the dam pushing the perfectly-dressed blocks together, much as Roman arches do in many well-known stone structures.

References

McManus, Paul. "John Redpath, the Whispering Dam, and Sugar." mysteriesofcanada.com. VIZCAN Systems Corporation, n.d. Web. 20 Oct. 2009. .

Watson, Ken. "History of Rideau Lockstations; Jones Falls Locks 39-42." rideau-info.com. N.p., n.d. Web. 20 Oct. 2009. .