94 MASS. EXPERIMENT STATION BULLETIN 355 



Samples Purity Germinatio 



446 Field Crops for Purity and Germination 446 446 



5 Field Crops for Purity Only 5 



7 Field Crops for Germination Only 7 



143 Lawn Mixtures for Purity, Germinations involving 



504 ingredients 143 504 



71 Lawn Mixtures for Purity Only 71 



1 Lawn Mixture for Germination Only 1 



1344 Vegetable Seeds for Germination 1344 



152 Flower Seeds for Germination Only 152 



194 Flower Seeds for Purity Only 194 



15 Tree Seeds for Germination Only 15 



50 Tobacco Seeds for Germination Only 50 



2428 859 2519 



Field tests to determine trueness to type were conducted in cooperation with 

 the Departments of Vegetable Gardening, Floriculture and Agronomy, which 

 tested respectively 120 samples of vegetable seeds, 172 samples of flower seeds, 

 and 23 samples of oats. All samples for these tests were collected and submitted 

 by the State Commissioner of Agriculture, with the exception of ten samples of 

 oats which were sent in by seedsmen. 



Miscellaneous Work. (F A. McLaughlin and Jessie L. Anderson.) The Seed 

 Laboratory cleaned 18 lots of onion seed and 42 lots of tobacco seed for Connecti- 

 cut Valley farmers. 



One hundred and seventy-six samples of corn, oats, barley, and wheat, pur- 

 chased bv various state institutions, were examined for conformity to grade 

 purchased; and eighty-one samples of ground cattle and poultry feed, collected 

 by inspectors or sent in by dealers and farmers, were examined microscopically. 



DEPARTMENT OF VETERINARY SCIENCE 

 J. B. Lentz in Charge 



Poultry Disease Control Service. (H. \^an Roekel, K. L. Bullis, O. S. Flint,, 

 and M. K. Clarke.) 



1. Pulloriim Disease Eradication. During the 1937-38 testing season a total 

 of 314 flocks (including six flocks of poultry other than chickens), representing 

 502,341 samples (including 4,356 from fowl other than chickens), was tested. 

 Among the samples submitted from fowl other than chickens 216 were also tested 

 with paratyphoid antigen (5. derby). Blood samples were submitted from chicken 

 flocks in 11 counties. Norfolk, Worcester, Middlesex, and Bristol Counties led in 

 the number of tests. For the State as a whole, increases were observed in tested 

 flocks (1), tested birds (31,708), tests (36,007), and non-reacting flocks (5). 

 The average percentage of infection was further reduced from 0.37 to 0.17. 

 Pullorum infection was detected in six flocks which were negative to the macro- 

 scopic tube agglutination test the previous year. The source of the infection 

 could not be explained in four flocks. The detection of infection in previously 

 non-reacting flocks emphasizes the value and importance of annual testing, as 

 well as of effective preventive measures. 



Testing results show that Massachusetts is in a position to replace its poultry 

 population from 100 percent tested, non-reacting flocks. A total of 241 non- 



