470 EXPEEIMENT STATION RECORD. 



Insects that eat potato beetles, M. V. Slingerland {Rural New Yorker, 59 

 {1900), No. 2637 , p. 54-'). — Brief notes on PerUluK rircvmeinchw. 



Cost of fumigating- an orchard of two hundred and seventy-five trees, 

 W. J. Allen {Agr. Gaz., New South Wales, 11 {1900), No. 9, pp. 754-756).— Orange 

 trees of medium size were fumigated with hydrocyanic-acid gas, at an average cost 

 per tree of 9 ctn. 



Petroleum as an insecticide, G. Davis {Rural New Yorker, 59 {1900), No. 2637, 

 p. 542). — The author relates experiences with kerosene oil sprayed upon peach trees 

 at the time of budding. A serious injury to the tree resulted from the use of kerosene. 



Use of nicotine as an insecticide, E. Laurent and M. Cornu (Mess. Agr., 5. ser., 

 1 {1900) , No. 6, pp. 232-235). — A solution of nicotine was prepared with the following 

 constituents: Water, 5; nicotine, 1; methyl alcohol, 10; black soap, 10; carbonate of 

 soda, 2. The insects upon which experiments with this solution were made included 

 the caterpillars of Bombyx neustria, Liparis dispar, red spiders, bark lice, thrips, etc. 

 The mixture was found to be exceedingly effective against caterpillars, and killed 

 the common species of plant lice within 20 minutes. 



Spray calendar ( Vermont ,Sta. Spec. BuL, Mar. 1900, pjp. 4, fiff- -?)• — Brief notes on 

 formula' for the preparation of the more common insecticides and fungicides, with 

 reference to their use in the treatment of common insect and fungus diseases. 



FOODS— ANIMAL PRODUCTION. 



The ideal ration for an army in the tropics, E. L. Munson {Jour. 

 Mil. 6'erv. Itist. United States, 26 {1900), No. 105, pp. 309-31^6).— 

 On the basis of a review of the literature of the subject and of per- 

 sonal observation, the author concludes that in the tropics less meat 

 and similar nitrogenous food is required than in temperate or cold 

 regions, while the proportion of other constituents of the diet, whose 

 principal function is to yield energy, is also somewhat less. The daily 

 dietary standard proposed for United States troops serving in the 

 tropics is as follows: Protein, 100 gm. ; fat, 65 gm., carbohydrates, 

 650 gm. ; and fuel value, 3,491 calories. The diet suggested consists 

 of such articles as fresh beef, bacon, fresh lish, flour, ))eans, potatoes 

 and some other vegetables, rice, and sugar; in other words, of articles 

 to which the soldier is accustomed and which are supplied under the 

 existing regulations, the chief changes being in the quantities and 

 combinations used. On an average, the -l dietaries which are pro- 

 posed as illustrations would furnish 109 gm. of protein and 3,375 

 calories. 



The composition and physiological effects of beef broth, A. 

 Gautier {Bietet. and Hyg. Gaz., 16 {1900), No. 5, p. ^75).— Abstract 

 of an article published in Le Bulletin Medical. The composition of 

 beef broth made by boiling 1 kg. of lean beef in 3 kg. of water, with 

 and without the addition of salt and vegetables, is reported. When 

 salt and vegetables were added the dr}" matter per liter of broth 

 amounted to 27.3 gm. Deducting 7 gm. for the weight of the salt 

 added, this was 1 gm. more than was obtained when the broth was 



