- Lesson 141: Soda Water
- Lesson 142: Joseph Priestley
- Lesson 143: Weighing Scale
- Lesson 144: Boring Machine
Soda Water / Joseph Priestley
Joseph Priestley investigated the properties of air when he was investigating sparkling wine, and he discovered oxygen. He mixed carbon dioxide gas with water, and got soda water, which later grew into the huge corporations like Coca Cola and Pepsi. Priestley also wrote a book on electricity, which influenced other important inventors
Weighing Scale
Salter was a spring maker who invented the spring scale. It made rapid measurements possible by using a weight scale, as opposed to the balance scale, which used weights and took more time to use.
Boring Machine
The hardness of the French iron cannons were uneven, so they sent some men to John Wilkinson, to learn how to make cannons. Wilkinson made a boring machine that made the metal rotate, rather than the drill bit. The boring machine helped James Watt with his steam engine, and with making cannons.