First published in 1909, this practical engineering handbook is in its complete and unabridged original form, extensively illustrated and full of instruction that is as useful and practical today as it was when originally published. Contents include - Classification Of Transformers - Modern Methods Of Illumination - Elementary Theory, Fundamental Formulae - Practical Design - Efficiency Calculations - Constuctional Details. Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.