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



seed was planted as soon as cut in a large potato field by means of a planter, 

 the stem-end and the bud-end pieces in contiguous rows. The plants were 

 given the same care during the growing season as the field proper. The size 

 of the plots was one-seventeenth of an acre. 



The stand obtained was the same for both kinds of seed and so also was the 

 general appearance and vigor of the plants. The following yields were obtained : 



Seed pieces from bud-end of tuber, 402.46 bushels per acre. 



Seed pieces from stem-end of tuber, 394.41 bushels per acre. 



Evidently aU parts of the tuber are equally fertile. 



Control of Termites. 



The record of this project was published as Bulletin No. 204. The project 

 developed a new and efficient means for the eradication of termites in the tim- 

 bers of buildings. 



Insect Record. 



The complete set of records maintained by the Entomology Department has 

 been maintained, and interesting facts have been added. The native stalk 

 borer, Pa-paipema niiela, continues to be abundant. It is very generally con- 

 fused with the European Corn Borer. The numbers of the browntail moth, 

 Euproctis chrysorrhoea, continue to increase. There was extensive feeding by 

 the gipsy moth in certain locahties, but this was followed by rapid development 

 of the so-called "wilt disease" among the caterpillars. 



Studies upon the Lime Requirement of New Hampshire Soils. 



The work upon this project was continued bj' H. R. Ilraybill and C. P. 

 Spaeth in co-operation with the county agents along the same lines as the past 

 two years. During the past season 266 samples were tested, in addition to 

 about 100 samples sent in by individual farmers and about 80 samples col- 

 lected from legume demonstration plats. 



The following table shows the summary of the results obtained from the 

 test carried on in co-operation with the county agents for the past three years 

 (Table XIV). 



Methylene Blue Project. 



Investigations of the methylene blue test by J. M. Fuller and H. F. DePew 

 (Dairy Husbandry) have indicated that the test gives a satisfactory index of 

 the keeping quahty of milk. The relation between the reduction time of the 

 methylene blue test and the niunber of bacteria as shown by the plate method 

 is only fakly definite. This relation may be expressed thus: 



Reduction time 3 hours or less, 500,000 or more bacteria per cc. 



Reduction time 4-7 hours, 150,000 bacteria per cc. 



Reduction time 8 hours or more, less than 25,000 bacteria per cc. 



It has been found that there is no definite relation between the acidity of 

 milk and the bacterial count. Each of four samples of milk in one group of 

 13 showed 18 per cent acidity. The bacterial count of these four samples was 

 190,000, 65,000, 485,000 and 3,500 respectively. Again each of two samples 



