The Letter Of Peregrinus

An analysis of the " Epistola " shows that Peregrinus was the first to assign a definite position to the poles of a lodestone, and to give directions for determining which is north and which south ;

He proved that unlike poles attract each other, and that similar ones repel ;

(c) He established by experiment that every fragment of a lodestone, however small, is a complete magnet, thus anticipating one of our fundamental laboratory illustrations of the molecular theory ;

He recognized that a pole of a magnet may neutralize a weaker one of the same name, and even reverse its polarity ;

He was the first to pivot a magnetized needle and surround it with a graduated circle, Figs. 2 and 3.1

He determined the position of an object by its magnetic bearing as done to-day in compass surveying ; and

' It is probable that Flavio Gioja, an Italian pilot, some fifty years later, added the compass-card and attached it to the magnet.

Saving Power, Saving The World

Saving Power, Saving The World

Get All The Support And Guidance You Need To Be A Success At Helping Save Power. This Book Is One Of The Most Valuable Resources In The World When It Comes To How To Use Renewable Energy As Your Alternative Power Suppliers.

Get My Free Ebook


Post a comment