104 MALARIA 



ment than any other improvement, either public or 

 private. Respectfully submitted, 



Harold Farnsworth Gray, 

 Field Agent and County Sanitary Inspector. 



Analysis of Cost of Penryn Campaign 



Field and Laboratory Equipment $ 3°-83 



Materials (oil, etc.) 35- 2 ° 



Freight 4- 2 7 



Salaries of Field Agents 45 8 7° 



Expenses of Expert (Professor Herms) 129.15 



Expenses of Field Agents 39-7° 



Incidentals 17-9° 



Total £71575 



Percentages of Total Cost 



Per Cent 

 Field and Laboratory Equipment 4-3 



Materials 5-° 



Freight 0.6 



Salaries of Field Agents 64.1 



Expenses of Expert (Professor Herms) 18.0 



Expenses of Field Agents 5-5 



Incidentals 2.5 



Total 100.0 



Number of days Field Agents worked in each month : March, 

 31; April, 20; May, 23; June, 30; July, 22 ; August, 31; Sep- 

 tember, 15; October, 6; November, 1. 



Approximately 360 gallons of oil used. 



From the above it will be seen that the Field Agents 

 devoted about 180 working days to the crusade, at a 

 total cost, materials and all, of about $715. The area 

 continuously covered during that time was approxi- 



