166 EXPERIMENT STATION RECORD. [Vol. 38 



The examination of canned salmon for bacteria and tin, L. D. Bushnell 

 and C. A. A. Utt (Jour. Indtis. and Engin. Chem., 9 (1917), No. 7, pp. 618, 

 679). — Forty-four samples from 26 concerns were examined and found to be 

 sterile. Of the 20 samples analyzed for tin, all were found to contain less than 

 50 rag., which is well below the tolerance of 300 mg. 



Nutrition investigations upon cottonseed meal, II, Anna E. Richardson 

 and Helen S. Geeen (Jour. Biol. Chem., SO (1917), No. 2, pp. 243-258, figs. 13).— 

 A contiiiuation of work upon cottonseed meal as a food for human consumption 

 (E. S. R.. 35, p. 469). 



It was found that with 50 per cent of cottonseed meal in the diet albino rats 

 lived for from 400 to 565 days. With the addition of protein-free milk and 

 milk fat the ration was sufficient for normal growth and reproduction to the 

 third generation. This did not result with a 50 per cent cottonseed flour with 

 a lack of proteiu-froe milk and milk fat. In the former case, while there was 

 no better growth, reproduction was increased and mortality lowered by the 

 addition of 5 per cent of casein. When additional mineral matter was sup- 

 plied, conditions in the second generation seemed still better. 



No toxic effect was apparent from 45 to 50 per cent of cottonseed flour in 

 the ration through four generations or during 565 days of the life of an indi- 

 vidual. Petroleum ether extract of cotton seed in a well-balanced ration had 

 a depressing efEoct on weight. Ethyl ether extract from petroleum-ether- 

 extracted cotton seed and ethyl ether extract from Allison cottonseed flour 

 showed no harmful effects. 



The possibility of typhoid infection throug'h vegetables, C. O. Melick 

 (Jour. Infect. Diseases, 21 (1917), No. 1, pp. 28-38).— It was found that the 

 longevity of Bacillus typhosus depends on the strain and the soil, varying from 

 29 to 58 days. Under natural conditions radi.shes grown in contaminated soil 

 were infected after periods of 28, 35, and 37 days, and lettuce after 21 days. No 

 evidence was found that the organisms entered the interior of the plants, but 

 organisms attached to the surfaces were not removed by ordinary washing. 



Fresh fruits and vegetables as conservers of other staple foods, Caroline 

 L. Hunt (U. S. Dept. Agr., Farmers' Bui. 871 (1917), pp. 11).— The place of 

 fruits and vegetables in the diet in general is discussed, and specific directions 

 given for the use of green peas and beans in place of meat, potatoes in place 

 of cereals, and fruit to save sugar. A model menu and various recipes are 

 included. 



Microscopical studies on tomato products, B. .7. Howard and C. H. Steph- 

 enson (U. S. Dept. Agr. Bui. 581 (1917), pp. 2^, figs. 5). — Microanaly-ses of a 

 considerable number of tomato products indicated that such products when 

 made from stock judged acceptable by visual inspection, do not show high 

 counts of microorganisms. High counts indicate that the stock was in bad 

 condition or handled in an insanitary manner. Pulp stored in barrels gave 

 high counts. 



The field work done indicates that stock should not contain over 1 per cent 

 of decayed material and have a spore count of less than 20. A bacterial count 

 of 15,000.000 indicates little as to the amount of decay, but beyond this point 

 up to 20 per cent of rot each 20,000,000 means an increase of about 1 per cent 

 of rot. High counts in tomato pastes and sauces indicate bad stock or insani- 

 tary handling. 



The method used for the microanalysis of tomato products is included. 



Maine packed blueberries, corn, and sardines, C. D. Woods and A. M. G. 

 Soule (Maine Sta. Off. insp., 83 (1917), pp. 37-5,2 ) .—This includes, among 

 other data, tables giving the amount of water in different brands of canned 

 blueberries and corn and the condition of canned sardines. 



