1909

Year: 1909

Pages: 72 pages construction and 102 pages for the installation

Size: 3.5" X 5.5"

Availability: Extremely Rare

Facts:

 This is the first time that mentioned (4) 90 degree bends per run was the max. for a run of conduit.

Here is a picture of the construction rules and installation rules booklets. Notice the construction has marine work and the installation does not. This leads me to believe the installation book was published first.  Also, there is a booklet that has marine work in it. Also, here is a supplement for Electric signs.