Download Calculator puzzles, tricks & games by Norvin Pallas PDF

By Norvin Pallas

A suite of video games, tips, and puzzles which illustrate the functions of a calculator.

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In a few days the mine was dry. It was the deepest mine in the district, and orders for engines began to come in. They came so fast that in the course of the next four or five years almost all the mines in England and Scotland were supplied. Boulton, Watt's partner, felt from the first that the greatest field for the steam engine was in mills and factories. When orders for pumping engines fell off, Watt went to work on a factory engine. The first factory engine was built in 1782, and was for a corn mill.

Upward Step by Step As soon as George was old enough, he was put to work. His first job was herding cows, at four cents a day. Growing older and stronger, he was hired out to do light farm work. He drove horses, milked cows, and hoed in the garden. But he soon joined his brother James at the mine, as a "picker" to clean the coal of dirt and stones. His wages were now twelve cents a day, and they were increased to sixteen cents when he became driver of the gin horse. Driving a gin horse was well enough, but George wanted to be an engineer.

For this reason it is not surprising that Watt's engine was scarcely perfected, before men tried to make it propel a boat. The First Steamboats The first American to attempt the propelling of a boat by steam was William Henry, a gunsmith of Lancaster, Pennsylvania. In 1760, Mr. Henry was in England on business. He took great interest in the talk going on then about the use of steam to drive machinery, propel boats, and the like. On his return to America, he built an engine fashioned after one of Newcomen's engines, and so placed it in a boat that it worked a number of paddles.

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