2610 



Journal of Applied Microscopy 



ever used, though the author has in vain suggested it, in flat cases, or indeed in 

 wall cases, is to fix over the object, to be closely examined, hand glasses of low 

 magnifying powers. The value of these is considerable, and the pleasing inter- 

 est evoked by seeing the magnification a sensible attraction to visitors. 



I have alluded to turnstiles for the mounting of photographs. A system of 

 surprising efficiency for registering and keeping photographs easy of access is 

 adopted at the Pratt's Institute in Brooklyn. It consists in deep drawers of the 

 depth of the photograph so that the latter can be placed on end like cards. 

 Separators made of thin wood or cardboard, labelled across the top, with the 

 name of the country, town, city, district, locality, etc., placed between them, 

 afford, like a card catalogue, instant guidance to the photograph desired. It is 

 a most simple and elegant method of preservation and use. 



Fig. !»4. — Sabre-tooth tiger from South Dakota. 



A very remarkably beautiful material for stands has been shown to the author 

 by the agent of Albert Bohm, Wool Exchange Building, New York. It is a very 

 dense black slate susceptible of a superb glossy finish. Its use in trade has 

 been for switch boards, electric attachments, blocks, etc., but there are great 

 possibilities in it as material for pedestals, bird stands, etc. It does not seem 

 to be too expensive and there can be only one opinion as to its beauty. It is 

 imported, already cut and finished, from Austria. 



As an example of very beautiful installation, the plate (Fig. 94) is given of 

 a sabre-tooth tiger from South Dakota, prepared by Mr. Hermann, in such a 

 way that every bone can be removed for examination. L. P. Gratacap. 



American Museum of Natural History. 



