Drinking-fountains 



131 



rrt 



p^ " & 



on the market, many of which are automatic and 



keep a small supply of water constantly before the 



fowls. Under favorable conditions these fountains 



will, undoubtedly, prove very satisfactory. Under 



adverse conditions, however, 



some of them have not given 



satisfaction, for the reason 



that they are difficult to 



clean. If the fountain becomes 



tainted, as it is very likely 



to do in warm weather, it is 



not so readily cleaned as a 



simple tin or earthen dish. 



Drinking-fountains that are 



not readily cleaned are .x 



objectionable. Many r- 



automatic fountains are FIG. 47. An improved drinldng-fountain 

 i , -i with a revolving reservoir. 



constructed on the 



principle of the student lamp, which permits a 

 small quantity of liquid to pass from the reservoir 

 whenever a bubble of air is permitted to enter it. 

 The inverted jug or bottle, with its opening placed 

 in a shallow dish, illustrates the principle. (See 

 Fig. 46.) An improved arrangement is seen in Fig. 

 47. The reservoir is supported between two uprights 

 and so arranged that it may revolve for conve- 

 nience in filling. 



Another arrangement, which has given satis- 

 faction in the hands of successful poultrymen, may 



