learning all about these wonderful machines. They have the universal keyboard, so he should experience very little difficulty in operating them if he can use the ordinary machine. They are also used to a large extent in railroad and steamship work for the writing of large sheets and "manifests," where thousands of figures are used and several copies are required. Learn all you can about the book typewriter, for its sphere of utility is increasing daily. many of them being used by large dry-goods stores and others for invoice and statement work.
The competition of the book typewriters has caused the manufacturers of the ordinary typewriter to bring out books with loose leaves. These are written on by the use of the typewriter in the ordinary way, and by a series of catches are securely fastened in book-form between covers. Protection against abstraction of the sheets is obtained by having each page numbered. By the use of the loose leaf books and an ordinary typewriter any kind of work can be successfully accomplished and bound securely in book-form.
THE CARD SYSTEM.
The writing of postal cards and envelopes upon the typewriter has until recently been attended with some difficulty. It was difficult to make the stiff card or thick envelope present an even, regular surface on the circular platen. The introduction of the
