SANITATION IN THE HOG LOT 497 



themselves. The results obtained from the tanks are so 

 good that I could not think of getting along without 

 them. Aly herd is now ten years old, and a record of 

 no lice or skin disease and no cholera in all this time 

 ought to satisfy au}^ reasonable man. It is no unconi- 

 mon thing to see one of these bathtubs crowded full of 

 pigs bathing and disinfecting and cooling themselves." 

 The Farmer's Voice describes the most primitive and 

 simple dipping or self-cleansing device yet suggested, as 

 follows: "Dig a hole in the hog lot or pasture, and till 

 it several inches deep with water on a hot day. Pour 

 into this half a gallon of coal oil or some other good 

 lice-killing liquid such as zenoleum, call the pigs to the 

 water hole and they will soon do the rest. This coal-oil- 

 water-mud bath should be repeated at intervals of about 

 a week, two or three times, when the lice will all dis- 

 appear. It is so easy and inexpensive that no pig grower 

 should be troubled with lice in hot weather when pigs 

 will so readily wallow in any water or a mud hole in 

 the ground." 



THE HOG LOUSE 



The illustrations on page 498 show, much magnified, a 

 half-grown hog louse, and the eggs from which the lice 

 are hatched. The following information and description 

 are by Prof. C. P. Gillette, entomologist at the Iowa 

 experiment station : "In the center is shown a portion of 

 the leg of a mature louse. It differs from that of the 

 half-grown specimen, by showing- plainly a second joint 

 in the claw. A full-grown louse is three-sixteenths of 



