electrograph การใช้

Electricity readings may be recorded continuously with a device known as an electrograph.
The original cover was designed by Mike Payne and was the first release of his " Electrograph " artwork.
Francis Ronalds created an early electrograph around 1814 in which the changing electricity made a pattern in a rotating resin-coated plate.
Squire became director of a wide range of companies, including the Ohio Surety Co . in 1894, the Standard Telegraph & Telephone Co . ( with Frank Rockefeller and Louis Severance ), the Electrograph Company of America in 1901, and, in the 1910s, the Maynard H . Murch Co . ( a Cleveland-based brokerage firm ) and the McGraw Tire & Rubber Company.