Overhead systems reference book

The Overhead systems reference book of 1927 has been published by the National Electric Light Association and was prepared by a special committee of the Overhead Systems Committee of the National Engineering Section of that association. This work is successor to the handbook on overhead line construction which was published in 1914. As stated in the preface, the purpose of this reference book is to present in one volume a description of the apparatus, material, methods and principles involved in overhead line construction and the tabulation of necessary formulas for the electric and mechanical solution of various transmission and distribution problems.