Charge slips are deposited temporarily in a drawer, and next morning are arranged by call-number and filed in the charging tray.
Put on every card in the catalog the call-number of the book to which it refers.
On this pocket, at the top, write the call-number of the book.
On this book-card, at the top, write the call-number of the book in the pocket of which it is placed.
This call-number should be written with ink on the pocket and book slip, which is kept in the pocket, or on the book-plate.
It is advisable also to write the call-number in ink on some definite page bearing the library's stamp.
By the call-number one can refer from any entry in it to the entry of the same book in the shelf-list.
After the call-number is written, varnish the label with a thin solution of shellac in alcohol.