Francis Jehl

Menlo Park Reminiscences: V. 1

The Manufacture Of Carbons For Electric Lighting And Other Purposes; A Practical Handbook, Giving A Complete Description Of The Art Of Making Carbons, Electrodes, [Etc.], The Various Gas Generators And Furnaces Used In Carbonising; With A Plan For A...

The Manufacture Of Carbons For Electric Lighting And Other Purposes; A Practical Handbook, Giving A Complete Description Of The Art Of Making Carbons,