32 UNIV. OF N. H. AGR. EXPERIMENT STATION [Bulletin 232 



Fertilizer Inspection 



One hundred and twenty-six samples of commercial fertilizers were 

 analyzed for the State Department of Agriculture, involving about 850 

 individual determinations. The results are being published. 



Miscellaneous Analyses 



Samples of feeds, fertilizers, soils, peats, leaf molds, lime and wood 

 ashes have been sent in by residents of the state. Of these, 80 have been 

 analyzed involving about 190 individual determinations. Many in- 

 quiries not involving analysis have been answered. 



Seed Inspection Work 



The seed inspection work for the State Department of Agriculture was 

 carried on as usual. During the 1927 season a total of 514 samples of seed 

 were handled by the laboratory. This included 395 collected by the state 

 inspector, 20 referee samples, 58 private samples, and 41 retests. 



Other Tests 



The regular advance registry tests and potato seed certification work 

 were carried on as usual. (Miscellaneous Income.) 



NEW PROJECTS 



The foregoing report has dealt with projects which have been con- 

 ducted to a stage where the results may be considered to have become of 

 some importance. In addition to these projects several others have been 

 started recently which it is believed should produce data of importance 

 during the coming years. Among these new projects are: 



Studies in Human Nutrition — Caloric Values of Food 



This project, which is a study of the nutritive values of foods sold at 

 institutional and commercial eating places in Durham, is carried out in 

 co-operation with Dr. Francis G. Benedict of the Nutrition Laboratory of 

 the Carnegie Institution, which has furnished the necessary apparatus. 

 Very few data are available on the caloric values of mixed foods, and the 

 oxy-calorimeter furnishes a much simpler means for this determination 

 than does the bomb. Up to the present time, combustion and Kjeldahl 

 determinations have been completed on 200 food samples. (Purnell 

 Fund.) 



Modified Sprays for the Codling Moth 



For two or three seasons the codling moth has been on the increase in 

 New Hampshire apple orchards. At the same time more drastic restric- 

 tions are being established as to permissible residues of spray materials 

 on fruit, especially compounds of arsenate and lead. A project has been 

 started, therefore, looking toward possible modification of the sprays 

 used to control the codhng moth, especially those applied after the fruit 

 has set. The schedule of various modified sprays includes reduction of the 

 amount of lead arsenate, substitution of calcium arsenate for lead arsenate, 

 substitution of oil sprays for applications containing arsenic, and reduc- 

 tion in number of sprays applied. (Hatch Fund.) 



