292 VEDKBili BEFOBTKB. �an inTention of broader soope than that specîfied în the orig-' inal patent, if such amendment could be made without inval- idating the re-issue by the introduction of new matter. ta the last re-issue the invention is described as foUows : �"This invention consists in an improvement in the con- struction of post-oflSce boxes, and its chief feature is the com- bination of a tier of pigeon-holes, made of wood, with a con- tinuons frontage of metal, such frontage consisting of doorg and their frames, whioh latter cover the ends of the boards which form the pigeon-holes. A series of wooden pigeon- holes, open at the rear, and covered at the front or on the outside by a permanent glasa front, is very old, and such a series was used for post-office boxes and in hôtels as a recep- tacle for keys, cards, letters, ete. There has also been in use a series of wooden pigeon-holes, each provided at one end with a door, as described in the patent granted to Jacob H. Beidler, May 28, 1866, but in this patent the door is described as hinged to the wood, and the construction is, consequently, insecure, as an ordinary pocket-knife or small chisel will, even in inexperienced hands, suffice to eut away the wood or pry off the door, so that the boxes may be entered. �"Pigeon-holes made of iron or other metal are diflBcult to construct, and very costly; but such pigeon-holes, each pro- vided with an ordinary metal door, would be sufficiently secure. Buch a degree of security, at comparatively a low cost, is attained by «overing the front of a series of wooden pigeon- holes with a continuons metallio frontage — that is, a frontage which presents a continuons surfac* of metal ; or, in other words, a surface which covers the ends of the wooden pigeon- holes in such a manner that those portions of the wood to which the metallio frames are attached cannot be attacked when the doors making part of the frontage are closed. In eonstructing Yale's invention the body of the boxes, or the ■eries of pigeon-holes, is to be made of wood, in any usual manner, and the fronts thereof, viz., the doors and their frames, are to be made of iron or other suitable metal. �"Each door frame is of such size that it aids in covering the raids of the wooden partitions that form the pigeon-holes ����
