This notebook was used in June 1916 by B. H. Stahle for notes on
various chemical experiments. The entries describe cobalt-nickel
experiments, as well as experiments to determine the amount of
potash in samples of cement from the Edison Portland Cement Co.
Several items have been inserted into the book, including one
page of notes and drawings by Edison. The front cover is labeled
"B Stahle"; the spine is labeled "029.4." The pages are
unnumbered. Approximately 15 pages have been used. Only the item
by Edison has been selected. Courtesy of Thomas Edison National
Historical Park.