80 HISTORY AND SIGNIFICANCE OF SCIENCE 



canals, a large number of hydraulic devices, a smelting 

 furnace, and so on through a list of unbelievable length. He 



FIG. 7. Sketches Relating to Flying Machines. From the note books of 

 Leonardo da Vinci. (Courtesy of Scientific American.) 



forecast the coming of steam engines and steam navigation. 

 He drew plans of model towns and cities and was thus the 

 originator of the modern concept of the city beautiful. His 



