Free and Discounted Ebooks
Join 150,000 readers! Get our ebook deals straight to your inbox.


Men of Science

Cover image for


Published: 1920
Language: English
Wordcount: 18,526 / 62 pg
Flesch-Kincaid Reading Ease: 55.8
LoC Category: QA
Downloads: 3,978
Added to site: 2011.09.17 30767
Genre: Science

This book is a quite successful attempt at summing up the entire body of work of the great Archimedes. It contains Geometry as well as Mechanics and Hydrostatics.

Show Excerpt

are equal (Eucl. I., 5), (3) that, if two straight lines cut one another, the vertically opposite angles are equal (Eucl. I., 15), (4) that, if two triangles have two angles and one side respectively equal, the triangles are equal in all respects (Eucl. I., 26). He is said (5) to have been the first to inscribe a right-angled triangle in a circle: which must mean that he was the first to discover that the angle in a semicircle is a right angle. He also solved two problems in practical geometry: (1) he showed how to measure the distance from the land of a ship at sea (for this he is said to have used the proposition numbered (4) above), and (2) he measured the heights of pyramids by means of the shadow thrown on the ground (this implies the use of similar triangles in the way that the Egyptians had used them in the construction of pyramids).

After Thales come the Pythagoreans. We are told that the Pythagoreans were the first to use the term [Greek: mathemata] (literally "subjects of instruction



Join 150,000+ fellow readers! Get Free eBooks and book bargains from ManyBooks in your inbox. 

We respect your email privacy

login | register

User ID


reset password