1154 



Journal of Applied Microscopy 



In both the general laboratory and the histological laboratory, is a large drip 

 tank (one of them is shown in the illustration of the elementary laboratory) so 

 arranged that jars of living material can be kept alive by means of tubes from 

 the overhanging water pipe, or the tank can be used as a large fish tank by 

 plugging the outlet with a hollow plug of slightly less depth than the tank itself. 

 In the general laboratory this tank is used for keeping such animals as fresh 

 water mussels at the times when the classes are using them. 



For storage of the thousand and one things that are in constant use in the 

 laboratories, as well as the working collections in homeopathic vials and similar 

 small receptacles, we have a series of tray cases (one of which is shown in the 

 picture of the private laboratory). The trays are made of uniform size, and are 



HISTOLOGICAL LABORATORIES. 



interchangeable in position, or in the different cases. They run on one-half 

 inch cleats on the sides of the cases, and each one has a label holder upon the 

 front. In the trays that are used for homeopathic vials, partitions are inserted 

 parallel with the front and back of the trays. For such collections we use the 

 ordinary eight-drachm homeopathic vials. Arranged in this way, these trays 

 will hold 195 vials each, thus being extremely economical of room. Where 

 the trays are used for miscellaneous material, they are arranged alphabetically, 

 so that it is easy to place one's hand upon corks of various sizes, bottles, etc. 

 For the collections in homeopathic vials an accession catalog is kept, and the 

 bottles are arranged according to the numbers of this catalog. By means of a 

 subject catalog upon cards, it is easy to find any desired material. The trays 

 are of such a size that they hold a definite number of Pillsbury slide boxes, so 

 that they can be used also for packing away slide collections. The collection 



