28 MAINE STATE COLLEGE 



The arrangement of these pens has so far proved entirely satis- 

 factory, and is commended to those who desire to undertake diges- 

 tion experiments. 



The excrement bags in use by this Station consist on the inside 

 of the ordinary rubber cloth which can be purchased at any drug 

 store, and on the outside of bed ticking, which gives strength and 

 durability. These bags are attached to the animal by means of a 

 light harness. This harness is made as follows : A collar passes 

 around the animal's neck, and a band around the body just back 

 of the fore legs. To the neck collar are attached four straps 

 which pass lengthwise of the body, two along the back and twc 

 between the fore legs. The straps slide through slots in the body 

 band, and are attached to the bag on the back and under the belly 

 just front of the hind legs. The lower end of the bag is not 

 sewed together, but is closed when necessary by tying a string 

 around it. In this way the bags can be emptied by simply unty- 

 ing the string and allowing the contents to drop into a dish placed 

 underneath. 



