This notebook is undated but was probably used sometime during the 1880s. It is the first of two books containing notes about arc and incandescent lighting patents issued to various inventors between 1879 and 1881. Included are copies of patent drawings, along with notations of the filing and issue dates of the patents. Some of the entries also contain cross references to the claims recorded in Notebook N-81-09-13.2. There are 166 numbered pages preceded by an index.