Voi,. 7, 1921 RESEARCH COUNCIL PUBLICATIONS 
357 
Psychological Bulletin, November, 1918, Vol. 15, pages 361-426. Distributed 
free, postage 3 cents. 
REPORTS OF RESEARCH 
Advisory Committee on the Toxicity of Preserved Foods 
The bacteriology of canned foods. By John Weinzire. Reprinted from The Journal 
of Medical Research, January, 1919, Vol. 39, pages 349-413. No copies for dis- 
tribution. 
Carbohydrate fermentation by bacteria as influenced by the composition of the medium. 
By J. Bronfenbrenner and M. J. ScheESingER. Reprinted from the Pro- 
ceedings of the Society for Experimental Biology and Medicine, 1918, Vol. 16, 
pages 44-46. No copies for distribution. 
On methods of isolation and identification of the members of the colon-typhoid group 
of bacteria. Late fermentation of lactose. By J. Bronfenbrenner and C. R. 
Davis. Reprinted from The Journal of Medical Research, September, 1918, 
Vol. 39, pages 33-37. No copies for distribution. 
On methods of isolation and identification of the members of the colon-typhoid group 
of bacteria. The preparation of milk and milk-whey as culture medium. By 
J. Bronfenbrenner, C. R. Davis, and K. Morishima. Reprinted from 
The Journal of Medical Research, January, 1919, Vol. 39, pages 345-348. No 
copies for distribution. 
The micro plate. A simple procedure for study of bacterial activity. By J. Bron- 
fenbrenner and M. J. ScheESingER. Reprinted from The Journal of Medical 
Research, November, 1918, Vol. 39, pages 267-270. No copies for distribution. 
A new indicator for direct reading of hydrogen ion concentration in growing bacterial 
cultures. By J. Bronfenbrenner. Reprinted from The Journal of Medical 
Research, September, 1918, Vol. 39, pages 25-32. No copies for distribution. 
A rapid method for the identification of bacteria fermenting carbohydrates. By J. 
Bronfenbrenner and M. J. Scheesinger. Reprinted from American Jour- 
nal of Public Health, December, 1918, pages 922-923. No copies for dis- 
tribution. 
Studies on canning. An apparatus for measuring the rate of heat penetration. By 
W. T. BoviE and J. Bronfenbrenner. Reprinted from the Journal of Indus- 
trial and Engineering Chemistry, June, 1919, Vol. 11. Pages 7. No copies for 
distribution. 
A study of the micro-organisms found in merchantable canned foods. By E. W. Chey- 
ney. Reprinted from The Journal of Medical Research, July, 1919, Vol. 40, 
pages 177-197. No copies for distribution. 
Chemistry 
An improved method for the quantitative determination of caffeine in vegetable ma- 
terial. Ilex vomitoria as a native source of caffeine. Investigations undertaken 
at the request of the Division of Chemistry and Chemical Technology of the 
National Research Council. By Frederick B. Power and Victor K. Ches- 
nut. Reprinted from the Journal of the American Chemical Society, August, 
1919, Vol. 41, pages 1298-1312. Distributed free, postage 1 cent. 
Anti-dimming preparations for gas masks. Investigation undertaken at the request 
of the Division of Chemistry and Chemical Technology of the National Research 
Council. By Harry N. Holmes, F. F. Jewett, Gladys Leavell, Dortha 
BaieEy and Edna Shaver. Reprinted from the Journal of Industrial and Engi- 
