Declinometer
Hawkins' Electrical Dictionary · 1915 · p. 3
—An instrument consisting of a telephone combined with a magnetic compa , designed to measure the declination of the magnetic needle, and note its variations.
Bu kavram başka kaynaklarda da geçiyor
Everybody's Encyelopedia (1912)
The American Dictionary and Cyclopedia (1910)
Chandler's Encyclopedia (1898)
Nuttall's Standard Dictionary of the English Language (1890)
Readham'da tam maddeyi gor →