23. Each draughtsman will be supplied with a sketch book by the company,
in which he shall make all his notes, calculations and data referring to
his work, and under no circumstances shall notes of value be made on
loose sheets. Each entry should invariably be commenced with the subject
and date, and full notes made of data on which the calculations were
based, and the results obtained clearly stated. These books are to
remain the property of the company.