New apparatus designed especially to facilitate the preservation of food for use in metabolism experiments. 1

The writer exhibited a new form of apparatus that has been very serviceable in the preservation of fresh food by refrigeration. The apparatus consists in the main of a galvanized “angle iron” frame constructed to support glass trays specially designed as food containers. Fresh food, e. g., hashed meat, may be very satisfactorily preserved, without change of general composition, by placing it in covered trays of the kind referred to and transferring them immediately to such a frame in a freezing room. The general characters and relationships of the main parts of the apparatus are clearly shown in Figure i. The structure and dimensions of the glass trays are indicated in detail in Figures 2 and 3. See pages 30 and 31.

In the form of this apparatus now in use in this laboratory, each “angle iron” skeleton is 20 inches high, 21 inches wide and 10 inches deep. Twenty five glass trays fit snugly into as many stalls, 1 which are just a trifle wider and longer than the trays, and are arranged in five tiers. The removable horizontal rods at the front are so arranged as to prevent the trays from falling from the frame if the latter happens to be tilted forward. The “angle iron” fixtures at the rear prevent movement of the trays in that direction when the frame is tilted backward.

The glass trays are the essential parts of the apparatus and are excellent food containers. Plates of ordinary glass furnish very satisfactory covers for the contents of the trays. Such a glass lid, trimmed to fit intimately, can easily be put in place and can readily be elevated with a finger at the depression in the edge of the tray, at one end.