June 14, 1918] 



SCIENCE 



595 



their proper compartments is now replaced in 

 tlie same manner that it was removed. 



Clean fresh water is constantly supplied by 

 means of an inverted bottle (jB) provided with 

 an air-tight rubber stopper (R) and glass tube 

 5 mm. in diameter (G). The spring clips (C) 

 permit ready removal of the bottles for filling. 

 The bottles are supported at the lower end on 

 two bent wire nails (S) between which the 

 glass tube passes (Figs. 1 and 3). We have 

 found bottles containing eight ounces the most 



serviceable, as they are not too large and do 

 not need refilling very often. 



The albino rat is omnivorous in its diet and 

 will devour almost anything a man will eat. 

 They should be fed once each day. The food 

 consists of cracked corn daily, such table 

 scraps as are available, green stuff, such as 

 lettuce, cabbage, etc. Where a large number 

 of rats are being reared it is advisable to 

 prociu-e the refuse from a restaurant or hotel. 

 Table scraps give a fairly balanced diet and 



Fio. 1. Perspective drawing of the woven- wire 

 portion of the cage showing the dimensions and 

 plan of construction. 



B, drinking bottle; C, spring clips for holding 

 bottle; Cg, cage; Z) 4 in. X 4 in., sliding door in 



partition dividing the two compartments; D 6 in. 

 X 6 in., sliding doors into cages; G, glass drinking 

 tube from water bottle; L, lifts for sliding doors; 

 B, rubber stopper; Sn, galvanized-iron runs for 

 sliding doors; S, supports for bottle. 



Fio. 2. Galvanized iron bottom, giving dimensions 

 and plan of construction. 

 Fig. 3. Sectional view of drinking fountain 



showing the support of the bottle, S, and the man- 

 ner in which the tube leads into the cage. 



