89 



larger one and may do better per unit expense: Crystal City, 

 Mo., 8,000 population; expense, $7,080. An unnecessary error 

 in cutting the ditches made this expense somewhat greater than 

 it need have been. 



For results, the health officer states that malaria was reduced 

 from 80 per cent, to 90 per cent. A sickness insurance company 

 paid in 19 15 benefits to I2'i4 per cent, of its clientele, and in 

 1916, 2^/10 per cent. This would give a reduction of from 

 75 per cent, to 80 per cent., which, counting the usual re- 

 lapse, should mean a reduction of from 90' per cent, to 95 

 per cent, in cases contracted in 191 6. The expense was 88 

 cents per head. It should have been decidedly less; next year 

 not over 25 cents. 



I could give you a number more like these. Here is the 

 Crossett chart, the only chart I have. I don't know the expense, 

 but you see the reduction for the summer is from 1,650 cases 

 to 288, a reduction of 82^ per cent. Note the September ratios 

 when most of the relapses are eliminated are 600 and 46, a re- 

 duction of 921^ per cent. Derivaux did this, the Rockefeller 

 Foundation financed it, and it is as good work in malaria as has 

 ever been done anywhere. 



As I said, I could give you other instances, but aren't these 

 enough? Isn't the work as good as in Port Said and Panama, 

 which you Jerseymen did not wish to hear about ? I am naturally 

 proud of the Panama work, but as results these are better. My 

 work was not as difficult, nothing like as difficult, as the bulk 

 of the Panama work. 



I will not have time to speak of the other methods; screening, 

 also mosquito control, has been used where control of produc- 

 tion was impracticable, and has given good results, but less good 

 than that method. 



A demonstration of the third method, that of freeing all men 

 in a community from malarial parasites, was undertaken last 

 year by the Rockefeller Foundation in Mississippi. This 

 work was under the supervision of Drs. Bass, of New 

 Orleans, and Leathers, the Health Officer of Mississippi. I 

 understand that it was successful, but do not know any details. 



