36 N. H. AGR. EXPERIMENT STATION [Bulletin 212 



showed 21 per cent acidity. The bacterial count was 120,000 and 8,500 re- 

 spectively. Data also indicate that there is a lack of definite relation between 

 initial acidity and keeping quality. 



Forest Research. 



The forest plots were remeasured during the past j^ear by K. W. Woodward 

 (Forestry), and several new ones to determine the effects of thinning will be 

 established this coming year. 



MISCELLANEOUS INCOME PROJECTS. 



Under this head come the analysis work conducted for the State Department 

 of Agriculture, the Advanced Registry tests and other projects which are 

 largely self-supporting. 



White Diarrhea Work. 



The number of blood samples taken during the past year was the largest 

 since the beginning of the work five years ago, amounting to 40,000, reports 

 A. W. Richardson (Poultry Husbandrj') . It is probable that this is the " peak " 

 of the campaign. The number of flocks on the accredited list has now in- 

 creased from 23 to 39, which it is estimated will produce 880,000 disease-free 

 chicks during the year. With this volume of healthj'' stock permeating the 

 state, it is believed that the number of tests necessary will decrease somewhat 

 from now on. 



A new Ford coupe was purchased and an electric oven was added to the 

 equipment, thus facilitating greatly the handling of the large number of 

 samples. 



Advanced Registry. 



The number of cows on yearlj^ test increased from 238 to 289 during the 

 year. These were divided as follows by breeds: Ayrshires, 46; Guernsej's, 

 104; Holsteins, 49; Jerseys, 68; and Shorthorns, 22. The number of seven- 

 day tests decreased from 27 to 14. 



Potato Seed Certification. 



Work was continued by O. Butler toward building up a supply of high-grade 

 certified seed potatoes within the borders of the state. Thirteen and one-half 

 acres of Green INIountains passed certification in 1922 out of a total of thirty- 

 four acres submitted. The gross 3'ield of the fields that passed inspection was 

 4378.9 bushels, which is a mean yield of 324.3 bushels per acre. 



Feed Inspection. 



Two hundred and sixty-one samples of commercial feeding-stuffs were 

 analyzed for the State Department of Agriculture in connection with the 

 enforcement of the state law regulating the sale of these materials. The re- 

 sults of this inspection are reported in Bulletin No. 209. The relative number 

 of feeds in the respective classes is similar to that of the past two seasons. 

 There is a decrease in the number of oil meals and an increase in the number 



