History of the Typewriter

— 79 — Fig. 62 paper. But the fact that the Yost has stood its ground for so many years shows that the objection does not appear to be well founded. The pointer, which was a hinged plate fixed to the framework of the machine under the carriage, was a revelation in simple devices ; and one has only to point to the large number of machines which have since adopted a similar device to be assured of its use and value. The No. i was followed by a model called “ The New Yost,” in which a different form of escapement was used, and various other improvements added to the carriage. The square corners were literally and truly rounded off. No. 3 was the brief-sized model. The No. 4 Yost occupied the field for many years. It had seventy-six keys, retained all the good features of earlier models, and introduced a keyboard lock, improved the marginal arrangements, then adopted sliding and adjustable paper fingers, and many other devices. It was a stately machine, capable of being operated at very high speeds. Nos. 5, 6, 7, 8, etc., were identical machines in every way, saving that wider carriages were used. The ability to remove the carriage from the Yost, a feature which was employed from the earliest models, rendered the substitution of a smaller carriage an easy matter. Thus, a brief machine could be adapted to foolscap work, with the convenience that unfinished work did not require removal. As mimeography grew