Smithsonian Report. 1947. Abbott 



Plate 3 



1. Dr. Willanl II. \\ right ilcfti, cliicf of tli(> Division of 'rroi)ical Disra-^cs at the 

 National In.stitute of Health, and Dr. Kloi.se Cram carry on cxijerinicntal work 

 to safeguard our country from the introduction of snail-borne diseasi'.s. ( Photo- 

 grapli liy Perry.) 



2. 'I'iie laljoratorie.- in the Division of 'i'ropiral Diseases at the .Xational Institute 

 of Health are constantly receiving living snails from all parts of the country. 

 Each species of snail undergoes rigorous tests to determine its disease-carrying 

 potentialities. ( Piiotograph 1)\' Perrv.) 



