THE PENRYN CRUSADE 91 



Penryn, was employed by the campaign committee of 

 Penryn and Loomis to act as Field Agent. He was 

 to cover the vicinity of Penryn and Loomis, dividing 

 his time equally between the two towns. This plan 

 was adhered to until summer, when the people of 

 Loomis lost interest in the campaign and failed to 

 contribute their share of the funds necessary to carry 

 on the work. The work of the Field Agent was there- 

 after confined to Penryn. 



A survey of the region to be covered was first under- 

 taken under the personal supervision of Professor 

 Herms, and the places where Anopheles larvae were 

 found were marked with small red flags. The Field 

 Agent, when these pools were oiled, replaced the red 

 flags with white ones, and the pools thus marked were 

 kept under observation. After Loomis dropped out 

 of the campaign, the activities of the Field Agent were 

 confined to an area of such size that marking the 

 pools was unnecessary, and as the campaign progressed 

 definite breeding places were recognized, kept con- 

 stantly under observation, and oiled as often as neces- 

 sary. 



The construction of the Southern Pacific Railroad 

 obstructed the natural drainage in several places, 

 causing standing pools of water, notably those in the 

 center of Penryn. The officials of the company were 

 spoken to in the matter, and at once responded by 

 sending the Roadmaster to Penryn to see Professor 

 Herms. The places referred to were promptly filled 



