History lesson 100

The first invention I learned about this week was dynamite. Alfred Nobel invented dynamite after his brother was killed in an explosion. Dynamite is a powerful explosive that is stable and useful for demolishing hard materials. Nobles’ brothers extended its use into mining, and railroad companies. It was used extensively in tunnel building. It ledContinue reading “History lesson 100”

History lesson 95

The first invention I learned about his week was Roller skates. James Plimpton invented roller skates in 1863. They are simple devices. They are shoes-on-wheels. They allow people to have fun and play sports. Plimpton took advantage of the desire for relaxation. When the war ended and marketed new skating rinks. The roller skates combinedContinue reading “History lesson 95”

History lesson 75

The first invention I learned about this week was condensed milk. Gail Borden invented condensed milk after seeing children die from ingesting contained milk, and after becoming interested medicine after his wife died. Condensed milk is heated to kill bacteria, evaporate water, and with sugar added as a preservative. It was an important part ofContinue reading “History lesson 75”

History lesson 90

The first invention I learned about this week was the postcard. Charlton and Lipman invented the postcard based on their experience in the stationery profession. Postcards are cheap, simple ways to deliver a long-distance message. The pictures and photos on them create interest that motivates people to buy them. The internet has had made theContinue reading “History lesson 90”