THE PRELIMINARY SURVEY 



The success of a campaign depends on a proper 

 preliminary survey of the situation with wise recom- 

 mendations for procedure. Hardly two localities offer 

 the same difficulties, and no one could wisely specify 

 a workable program without first having visited the 

 field and studied the situation. The following is the 

 preliminary report on the Los Molinos project. This 

 report indicates the necessity for a specific study of 

 each proposed crusade. 



Preliminary Report on Malaria Prevalence and Control on the 

 Irrigated Land Project of the Los Molinos Land Company of Los 

 Molinos, Tehama County, California, made at the request of Thomas 

 F. Means, Manager, by Harold Farnsworth Gray, under the direction 

 of William B. Herms, Assistant Professor of Applied Parasitology, 

 University of California, Berkeley, California, September 30, iqii. 



Introduction. — On the afternoon of Monday, Sep- 

 tember 25, 191 1, Thomas F. Means, Manager of the 

 Los Molinos Land Company of Los Molinos, Tehama 

 County, California, called on Professor William B. 

 Herms of the Subdivision of Parasitology, University 

 of California, Berkeley, California, stating that on the 

 irrigated project of the said company malaria had be- 

 come prevalent and that it was feared that the prev- 



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