12 BULLETIN 131, U. S. DEPARTMENT OF AGRICULTURE. 



REPELLENTS FOR APPLICATION TO WOUNDS. 



Jensen (1909) gives three formulas of repellents for application 

 to wounds: 



Formula No. 1 : 



Oil of tar 8 ounces. 



Cottonseed oil to make 32 ounces. 



Formula No. 2: 



Powdered naphthalin 2 ounces. 



Hydrous wool fat 14 ounces. 



Mix into an ointment. 

 Formula No. 3 : 



Coal tar 12 ounces. 



Carbon disulphid 4 ounces. 



Mix ; keep in a well-stoppered bottle and apply with a brush. 



/ Mixtures Nos. 2 and 3 are said to adhere to moist surfaces, and No. 

 3 is said, in addition, to form a coating over raw surfaces and protect 

 frojn the screw-worm fly. 



The editor at the close of the article in which the above formulas 

 are given adds the following formula : 



Oil of turpentine 1 dram. 



Phenol 1 dram. 



Cottonseed oil to make 4 ounces. 



Mix and apply freely to wounds. 



It is stated that this remedy is highly effective and is used widely 

 in the South. It is said to induce healthy granulation of wounds. 



EXPERIMENTAL TESTS OF VARIOUS SUBSTANCES AND MIXTURES 

 FOR REPELLING FLIES. 



For the purpose of determining the efficacy of various substances 

 and mixtures for repelling flies, a number of tests were made by the 

 present author at the Bureau of Animal Industry Experiment Sta- 

 tion during the summers of 1912 and 1913. The results of these tests 

 are given below. In making various mixtures for the purpose of trial 

 the plan adopted was to combine a pungent or odoriferous substance 

 with an oil which served mainly as a vehicle. 



CRUDE CARBOLIC ACID.i 



The following tests were made with 10 per cent crude carbolic acid 

 in cottonseed oil: 



On July 22, 1912, a calf was sprayed with a mixture of 10 per 

 cent crude carbolic acid in cottonseed oil. About 2 quarts of the 

 mixture were applied. The calf was discovered down about 7 to 10 



*A sample of the crude carbolic acid used in these tests was examined in the Bio- 

 chemic Division of the Bureau of Animal Industry, and was found to contain 21.8 

 per cent phenols. 



