Ernst Ruhmer - Das Selen und seine Bedeutung fur die Elektrotechnik - 1902

Description
Ernst Ruhmer - Das Selen und seine Bedeutung fur die Elektrotechnik - 1902
Das Selen - Quantity: 1 - Book

Original title:
Das Selen und seine Bedeutung für die Elektrotechnik mit besonderer Berücksichtigung der drahtlosen Telephonie von Ernst Ruhmer - Berlin 1902.

Publisher: Fachzeitschrift ‘Der Mechaniker’, F&M Harrwitz, Berlin, 1902.
64 pp., 49 drawings and photos.

The book offered is the original from 1902. From an estate.
The book is in outstanding condition, see photos.

Selenium is a chemical element (symbol: Se, atomic number 34). It is a grey non-metal.
The name is derived from the Greek Selènè (σελήνη), meaning ‘moon’.
Selenium was discovered in 1817 by Jöns Jacob Berzelius. The Englishman Willoughby Smith discovered in 1873 that selenium has photovoltaic properties, transferring light into electricity. Selenium is also photo-conductive: under the influence of light, the electric conduction strongly increases. It is used for that reason in optical electronics.
Selenium has the remarkable property to transfer light into electricity. The conduction of selenium depends on the amount of light.

Lot details
Object
Book
Number of Books
1
Subject
Das Selen
Author/ Illustrator
Ernst Ruhmer
Book Title
Das Selen und seine Bedeutung fur die Elektrotechnik
Condition
As new
Publication year oldest item
1902
Edition
1st Edition
Language
German
Original language
Yes
Publisher
Der Mechaniker, Berlijn
Dimensions
22×16 cm
Not registered yet?
By creating your free Catawiki account, you’ll be able to bid on any of our 50,000 special objects up for auction every week.
or Sign in