STATE BOARD OF HEALTH ON MALARIA 157 



death to 4400 people. A second group of ten counties * 

 contiguous to those of the first group shows one death 

 to each 15,820 of population. A third group of ten 

 counties - forming a chain along the coast shows one 

 death to each 57,614 of population. Twenty-eight 3 

 or almost 50 per cent of the counties show no malarial 

 deaths. Excluding the counties of San Francisco 

 and Los Angeles, 4 there remains the fact that two 

 thirds of the population live in counties which con- 

 tributed all the deaths from malaria, while one third 

 of the population of the State lives in counties which 

 had no malarial deaths in 1909. A further study of 

 the distribution of malaria in California shows Butte 

 County 15 per cent, Sacramento County 10 per cent. 

 San Joaquin 9.8 per cent, Fresno 6.2 per cent, Shasta 

 5.4 per cent of the deaths in 1909. These counties, 

 with only one sixteenth of the total population of the 



are : Shasta, Tehama, Butte, Yuba, Placer, Sacramento, Amador, San 

 Joaquin, Fresno, Kern. These ten counties alone sustain $1,488,960 of 

 the total annual estimated loss from malaria. The total value of all property 

 in these counties is scarcely 160 times this annual loss. 



1 Similarly arranged, these counties are : Trinity, Sutter, Yolo, Napa, 

 Contra Costa, Calaveras, Stanislaus, Merced, Tulare, and Kings. 



2 The third group forms a continuous chain of coast counties from San 

 Francisco to the Tehachapi Mountains: San Francisco, San Mateo, 

 Alameda, Santa Clara, Santa Cruz, San Benito, Monterey, San Luis Obispo, 

 Santa Barbara, and Los Angeles. 



3 One county, Sonoma, was inadvertently omitted from the coast county 

 group, but the one death which occurred does not materially change the 

 estimate. 



4 These two counties have a population of 921,043 (1910 census). In 

 1909 there were twelve deaths from malaria, or one in 76,753 population. 



