266 EXPEEIMENT STATION EECORD. 



ments of the instrnments niwl a difference in the basis of calculation by using 

 different tapes or charts. 



Attention is called to the fact that leakage is a prime factor in determining 

 the relative amount of cyanid to use in tents of different size and that there 

 may be other important factors, such as absorption of gas by the plant, to be 

 considered. The area basis in which a 20 ft. tree receives 4 times the dose of 

 a 10 ft. tree, which was first suggested by the California Station is thought to 

 be as safe a basis to adopt as any until our knowledge of the matter is further 

 advanced. The linear basis in which a 20 ft. tree receives twice as much as a 

 10 ft. tree is, however, made use of l:»y a majority of the fnmigators in 

 California. 



Descriptions of the methods of calculation, graphic calculation, use of the 

 chart for calculating direct measurements, heights and breadth, distance over 

 and around the tent, and directions for graduating tapes, etc., follow. The 

 circular concludes with an account of adjustments and the errors to be guarded 

 against in the two method:.. 



Preparation and use of concentrated lime-sulphur, J. P. Stewart (Penn- 

 st/lrdiiia i<ta. Bill. .0.0, pp. 3-15, fifix. ,9). — This Imllelin deals in a popular way 

 with the details relating to the i)reparation, preservation, and use of concen- 

 trated lime-sulphur solution. 



Insecticides, H. J. Quayle (California f<ta. Circ. ^.9, pp. 2). — This circular 

 gives formulas for Ifi of the more important insecticides and directions for 

 their use. 



FOODS— HUMAN NUTRITION. 



Report upon food (In Third Report of Commitfcc on rhy etiological Effects of 

 Food, Training, and Vlot1ii)ig on the Soldier. London: Gt. Brit. War Off., 1908, 

 pp. 2-lJf; Jour. Roy. Army Med. Corps, 12 {1909), No. 6, pp. 669-681; ahs. in 

 Brit. Med. Jour., 1909, No. 2533, pp. 162, 163; Lancet [London^, 1909, II, No. 3, 

 pp. 157-159). — In this article, theories of nutrition, food requirements, and 

 related questions are discussed and experiments and observations summarized 

 with reference to the quality, nature, and variety of food required by the 

 soldier during peace and during war, messing arrangements, the composition of 

 tinned meats, and the influence of preservatives. 



The nutrients and energy in the ration allowance of 4 regiments were calcu- 

 lated, maximum, minimum, and average values being reported. The average 

 protein ranged from 131 gm. per day with the infantry depot regiment to 142 

 gm. with the English infantry regiment, and the energy values from 3,248 

 calories with the Scotch infauti-y to 3,478 calories with the cavalry. Consider- 

 ing the general averages for the 4 regiments, the ration allowance supplied 

 133 gm. protein. 115 gm. fat. and 424 gm. carbohydrates, the energy value being 

 3.369 calories. 



For purposes of comparison data are quoted regarding British soldiers in 

 detention, the Royal Navy, the boys in the Royal Navy, and seamen of the 

 Royal Navy, and other figures regarding army and civilian diets. 



" Compared with Atwater's standard it [the average peace ration] is less 

 than the dietary of a man doing moderate work ; and it seems probable that by 

 itself it would not be sulficient except at times when the wox-k of the soldier is 

 rather slack. This dietary is, however, nearly always supplemented by food 

 bought for supper at the canteen or elsewhere; and the pay of all soldiers is 

 now sufficient to enable this to be done without hardship. The amount thus 

 bought probably brings the average energy value of the food up to fully 4,000 

 calories. . . . 



