This notebook covers the period March-November 1890. Most of the book contains routine ore analyses by John V. N. Dorr, Samuel Blan, and Charles W. Platt. Included are assays of a New Zealand ore submitted by Sir John Pender. There are also notes by Platt regarding experiment no. 353, tests of an electric traction motor. The front cover is labeled \"#602.\"" The pages are unnumbered, and the book has been used in both directions. Several pages have been removed from the book. Approximately 180 pages have been used.

Only the notes relating to experiment no. 353 have been selected."