438 Journal of Agricultural Research voi. xii, No. 7 



two oils were measured separately, and were then poured together into 

 a large iron kitchen spoon, which was placed as far back as possible in 

 the animal's mouth. Subsequently, however, the iron spoon was dis- 

 pensed with, the oils being poured directly into the hog's mouth, care 

 being taken to hold the graduate glasses out of reach of the hog's teeth. 



When the medicine had been given the pressure on the straps was 

 relaxed to enable the hog to swallow, the head still being held high. If 

 the hog refused to swallow, it could always be induced to do so by 

 plugging the nostrils with the finger tips. This forces the animal to breath 

 through its mouth, and to do so it must first swallow. 



Wefound this method fairly rapid for hogs weighing not over 100 pounds 

 (45.36 kgm.), 65 animals being dosed in one hour. It took eight hours 

 to dose the entire herd of 176 hogs, the labor of handling the heavy 

 brood sows making the operation much slower than when pigs of medium 

 size were being treated. In treating the brood sows it was necessary 

 to throw them on their backs and to hold them in this position while 

 dosing. As this caused considerable excitement to the sows, those 

 which from their appearance were soon to farrow were left untreated. 



Only one of the 176 hogs treated was injured. This animal, which 

 was accidentally dropped, injuring the spinal cord, was killed and exam- 

 ined for worms. One hundred ascarids (Ascaris suum) were taken from 

 a piece of intestine not over 30 cm. long, and many more remained 

 uncounted. Two days later the manager of the farm reported that a 

 great many ascarids were seen among the feces on the place, and about 

 two weeks later one of the pigs which was killed for food was found to 

 be entirely free from ascarids. The treatment therefore appears to have 

 been very successful. The treatment required 1.13 kgm. of oil of che- 

 nopodium and 7.5 liters of castor oil. With chenopodium at $11 per 

 kilo ($5 a pound) and castor oil at 66 cents per liter, the treatment in 

 this instance cost a trifle under 10 cents per hog, exclusive of the labor. 

 Even at the present high price of drugs, the cost is trifling compared 

 with the increased profit which may be expected to be derived from 

 healthy animals. 



For WORMS in sheep. — Four lambs weighing 16.6 to 26.1 kilos were 

 dosed with oil of chenopodium at the rate of 0.2 mil per kilo, the dose 

 which was found most effective for dogs. The medicine was given as a 

 drench emulsified with 147.9 mils of milk. Following the treatment, 

 one of the lambs contracted pneumonia, probably as the result of 

 some of the drench's entering the lungs. The treatment succeeded 

 in removing all the stomach worms from three lightly infested lambs, 

 but failed completely in the case of one heavily infested lamb, suggest- 

 ing that in this case the drench did not reach the fourth stomach di- 

 rectly, but was modified or absorbed in the rumen. 



The treatment was fairly efficacious for hookworms (Bunostomum iri- 

 gonocephalum) , removing two-thirds of those present, in this respect 



