Background
He was born in 1727 in Switzerland.
(Lang:- French, Pages 504. Reprinted in 2015 with the help...)
Lang:- French, Pages 504. Reprinted in 2015 with the help of original edition published long back1763. This book is in black & white, Hardcover, sewing binding for longer life with Matt laminated multi-Colour Dust Cover, Printed on high quality Paper, re-sized as per Current standards, professionally processed without changing its contents. As these are old books, there may be some pages which are blur or missing or black spots. We expect that you will understand our compulsion in these books. We found this book important for the readers who want to know more about our old treasure so we brought it back to the shelves. Hope you will like it and give your comments and suggestions. Original Title:- Essai Sur L'Horlogerie Dans Lequel On Traite De Cet Art Relativement A' L'Usage Civil A' L'Astronomie Et A' La Navigation En Eâ´Tablissant Des Principes Confirmeâ´S Par L'Expeâ´Rience Hardcover, Author:- Ferdinand Berthoud
http://www.amazon.com/gp/product/9333384618/?tag=2022091-20
He was born in 1727 in Switzerland.
In 1745 he moved to Paris, where he lived for the rest of his life. He is generally considered to have entered the workshop of Julien Le Roy. Ferdinand Berthoud rapidly acquired a reputation for technical competence and achieved recognition for his innovations in his field.
From 1755 onwards, he was entrusted with writing several reference articles on horology for the "Methodical Encyclopaedia" published between 1751 and 1772 under the supervision of Diderot and d'Alembert. Ferdinand Berthoud published his first specialised book in 1759, entitled L'art de conduire et de régler les pendules et les montres, à l'usage de ceux qui n'ont aucune connaissance d'horlogerie.
Among the many types of watches he made, his favorite was one with an unusual dial and a unique hand action.
The minute hand was mounted in the center of the lower half of the dial and traveled the usual complete circle over minute markings.
The separate hour hand, mounted in the center of the dial, started its motion toward the right from what normally would be nine o'clock.
The point was numbered VI, and 12 hours were marked off to another VI at the usual three o'clock position.
When the hour hand reached VI on the right, it was snapped back to the VI on the left by a spring, ready to start over again.
Berthoud is credited with making improvements in Pierre Leroy's detent escapement, the control mechanism used in chronometers.
(Lang:- French, Pages 504. Reprinted in 2015 with the help...)
He was made a member of the Institute of France and elected a Fellow of the Royal Society of London in 1764.
He had married twice, firstly Mademoiselle Chati of Cean, and then Mademoiselle Dumoustier of Saint Quentin, but had no children. His business passed to his nephew, Louis Berthoud (1759–1813).