vi CONTENTS. 



Part II. page 

 Bulletin No. 148. On the diagnosis of infection with Bacterium pul- 



lorum in the domestic fowl, 1 



Methods emploj^ed in the examination of eggs for Bacterium pul- 



lorum, 3 



The test fluid, 11 



Making the test fluid, 12 



Method of obtaining blood serum, 12 



Making the agglutination test, 13 



The influence of test foods of varying composition, . . .15 

 Comparison of results of macroscopic agglutination tests with 



analysis, 16 



Post-mortem findings of some reactors and non-reactors, . . 16 

 Specificity of Bacterium pullorum agglutinin, . . . .17 

 Agglutinins obtained by the immunization of rabbits against 



Bacterium pullorum, 18 



Summary, 18 



Bulletin No. 149. A study of variation in apples, .... 21 



Introduction, 21 



The productiveness of the trees, 21 



Size, 23 



Form, 29 



.,,. - Summaiy, 35 



Bulletin No. 150. Reports on experimental work in connection with 



cranberries, . . -.—-—: : 37 



Cranberry substation report, by H. J. Franklin, .... 37 



Weather observations, 37 



Frost protection, 38 



Fvmgous diseases, 39 



Copper sulfate in the flowage, 45 



Varieties, 46 



Blossom pollination, 48 



Fertilizers, 48 



Insects, 49 



Experimental insect work, 53 



The flowed-bog fireworm, 53 



The fruit wonn, 55 



The fruit worm parasites, : . 55 



