268 



COLIC. 



besides the force exerted with it in pushing fluids into the 

 intestine. An excellent substitute, and one not liable to the 

 same objection, is a bladder attached to a tube, such as repre- 

 sented in fig. 2. The tube is commonly made of wood an 

 objectionable material, because very subject to splitting in 

 alternations of moisture and dryness, particularly so if the 

 bore of the tube is of considerable size, as it should be to 

 secure efficiency. A tinned copper tube is preferable, as 

 combining lightness with strength; block- tin should have 

 the further advantage of cheapness, though at the sacrifice 

 of a no less important consideration durability. A much 

 more efficient instrument is the one represented in Fig. 1. 



Fig, 102. 



It consists of a straight metallic tube 12 inches long, tapered 

 and rounded off at one end, bent at a right angle at the op- 

 posite extremity, which supports a broad funnel about 6 inches 

 deep, and 7 in its greatest diameter. In using this instru- 



