96 MASS. EXPERIMENT STATION BULLETIN 369 



group, that is Group 11. Group III erythrocytes have the ability to remove the 

 agglutination power of the cow serum for erythrocytes of Group III and Group 

 II, but do not affect the ability of the serum to agglutinate Group I erythrocytes. 

 The classification of the erythrocytes of the parents of the original group of 

 chickens is not known. Of the original group, six chickens (28.6 percent) had 

 erythrocytes belonging to Group I, four chickens (19.0 percent) had erythrocytes 

 belonging to Group II, and eleven chickens (52.4 percent) had erythrocytes 

 belonging to Group III. The next generation was from a male having erythrocytes 

 of Group I and a female with Group II erythrocytes. Most of the progeny of 

 this mating had Group III erythrocytes, (17 chickens — 94.5 percent) and one 

 only had Group I erythrocytes. It is probable that some with Group II erythro- 

 cytes might have been found had more progeny of this mating been tested. 

 The third generation tested was from a mating of a male and female both of which 

 had Group III erythrocytes. Of those tested, nine (24.3 percent) were Group I, 

 twelve (32.4 percent) were Group II, and sixteen (43.3 percent) were Group III. 

 A complicated system of inheritance of erythrocyte type is suggested by the 

 presence of Group I erythrocytes in the progeny where both male and female 

 have only Group III erythrocytes. 



WALTHAM FIELD STATION 

 (Waltham, Massachusetts) 

 Ray M. Koon in Charge 



The members of the research staff of the Waltham Field Station are assigned 

 to the unit by the Departments of Botany, Entomology, Floriculture, Horti- 

 culture, and Vegetable Gardening. Reports of these departments give results of 

 investigations conducted at this branch station. 



Consultation and Information Service. A definite increase was noted in the 

 number of commercial vegetable growers, orchardists, florists, nurserymen, 

 arborists, professional gardeners, greenkeepers, and amateurs who came to the 

 Field Station this year to personally consult members of the staff. Many of these 

 organizations now hold meetings at the Station at irregular intervals, and the 

 Executive Committee of the Boston Market Gardeners Association meet reg- 

 ularly once a month. 



Evaluation Gardens. In a garden of 1500 species and varieties of herbaceous 

 ornamentals, all have been rigorously discarded which fail to qualify as hardy, or 

 are otherwise unsatisfactory in the latitude of Massachusetts. This has resulted 

 in a collection of real importance to nurserymen and landscape and amateur 

 gardeners. The value of such a collection, well grown and accurately labeled, 

 is evidenced by visits from over 3000 persons during the flowering season. 



Field Day. Perfect weather brought out 1250, a record attendance for the 

 twenty-first annual Field Day on August 2. Considered from all angles, it was 

 the most successful Field Day conducted by the Field Station. Exhibitors report 

 greatly increased interest on the part of the visitors in the mechanical equipment 

 they display. Interest in the celery contest was especially keen this year as the 

 new Summer Pascal variety was exhibited for the first time by local growers. 



Soil Testing Service. The demand for the soil testing service is increasing and 

 it is believed that the interpretation of the tests will contribute to a better under- 

 standing of some of our soil fertility problems. 



Massachusetts Nurseryman. Reports of findings and other pertinent informa- 

 tion are mailed to conmiercial producers of ornamental plants nine times a year 

 in mimeograph form called the "Massachusetts Nurseryman." 



