Item is 50 pages of printed forms filled out by hand. Documents the filling records for insulin and iletin at the Connaught Anti-Toxin Laboratories between April 2, 1923 and January 9, 1926. Information given includes: date of filling, lab. number, package number, unitage per c.c., no. c.c. per package, percentage excess, number of vials, and sterilizing record number.