| 1 | For Watt did not actually invent the steam engine. | |
| 2 | And though much is made of the steam engine, ice scarcely merits a mention. | |
| 3 | There are several possibilities being researched at present, such as electric, gas turbine, and "steam" engines. | |
| 4 | Laws that became the basis of a technological and social revolution: steam power and the industrial revolution. | |
| 5 | Milk cows and carrots, therefore, are human inventions as much as steam engines and gunpowder are. |