Excerpt from Technologic Papers of the Bureau of Standards, Vol. 153: Area Measurement of LeatherThe literature of this subject is very meager. The best mate rial available up to the time of the investigation by the Bureau is to be found in The Manufacture of Leather, by Davis.1 The first edition of this book devotes a chapter of 1 2 pages to the subject of leather-measuring machines, including 13 figures and a list of United States patents issued in the interval 1 790 - 1883, inclusive. The material of this chapter is almost entirely descriptive, cover ing both obsolete and existing types of leather-measuring machines. No information is given as to the performance possibilities or comparative Operating accuracies of the different types.In the 1897 edition of-the above-named work the space devoted to leather - measuring machines is reduced to four and one-half pages by the elimination of a considerable amount of material descriptive of obsolete or undeveloped types of leather-measuring machines. In this edition, only two illustrations are given, one of a typical wheel machine and one of a pin machine. On account of the scarcity of satisfactory illustrations of leather-measuring machines, both of these are reproduced in the present 'paper. Like the chapter in the earlier edition, the later treatment by Davis gives no information beyond descriptions of the machines and the manufacturers' claims for them. No adequate data of the sort required by the designer nor any indication of the sources and types of error to be expected are given.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.