72 THE HOUSE FLY 



" A temporary trap can be made of flexible cardboard, 

 following the same directions as for those made of tin. 

 Use glue or pins to fasten the ends. To render the trap 

 waterproof, paint the inside with melted paraffin wax. 

 This will hold any of the above remedies except the pure 

 kerosene." 



A cheap and effective means of destroying flies in dwell- 

 ings, outhouses, or stables is a solution made of one pound 

 of arsenite of soda, 10 Ib. of sugar, and 10 gallons of water. 

 Branches of trees with smooth leaves are either dipped or 

 sprayed with the solution, and then hung from the ceiling 

 or rafters. The flies, on settling on the branches, imbibe 

 the solution and die during the night. By this method 

 flies may be killed in vast, numbers. The solution may be 

 used with great effect in cattle kraals, which, during the 

 summer months, swarm with flies. In these instances, 

 however, the leaves and branches on which the solution 

 has been sprayed, or which have been dipped into it, must 

 be hung out of reach of the stock, as it is a poison. 



In military and other camps, this simple, effective, and 

 easily applied poison can be used with great advantage. 



A FLY CAMPAIGN AND THE RESULTS 

 The remarkable results achieved by the anti-fly cam- 

 paign conducted by the Sunday Times, during October, 

 November, and December 1913, are shown by the statis- 

 tics compiled by the Medical Officer of Health for Johan- 

 nesburg for the first four months of that year. The 

 crusade accomplished the death of 61,943,000 flies. This 

 means that there were the following summer season 

 67,901,083,980,428,722,176,000,000,000,000,000 fewer flies 



