358 
RESEARCH COUNCIL PUBLICATIONS Proc. N. A. S. 
neering Chemistry, December, 1919, Vol. 11, 13 pages. Distributed free, post- 
age 1 cent. 
Studies on the nitrotoluenes. I — Binary systems of a nitrotoluene and symmetrical 
trinitrometoxylene. Investigation undertaken at the request of the Division of 
Chemistry and Chemical Technology of the National Research Council. By 
James M. Bell and Jambs P. Sawyer. Reprinted from the Journal of Indus- 
trial and Engineering Chemistry, November, 1919, Vol. 11. Pages 9. Distrib- 
uted free, postage 1 cent. 
Studies on the nitrotoluenes. II — Refractive indices of mixtures of p-nitrotoluene, 
1,2,4-dinitrotoluene and 1,2,4,6- trinitrotoluene. Investigation undertaken 
at the request of the Division of Chemistry and Chemical Technology of the 
National Research Council. By Jambs M. Bell and Edmund O. Cummings. 
Reprinted from the Journal of Industrial and Engineering Chemistry, November, 
1919, Vol. 11. Pages 3. Distributed free, postage 1 cent. 
Studies on the nitrotoluenes. Ill — Binary systems of the components p-nitrotoluene, 
1,2,4-dinitrotoluene, 1,2,4,6-trinitrotoluene. Investigation undertaken at the 
request of the Division of Chemistry and Chemical Technology of the 
National Research Council. By James M. Bell and Charles H. HerTy, Jr. 
Reprinted from the Journal of Industrial and Engineering Chemistry, Decem- 
ber, 1919, Vol. 11. Pages 10. Distributed free, postage 1 cent. 
Studies on the nitrotoluenes. IV — The three-component system: p-nitrotoluene, 
1,2,4-dinitrotoluene, 1,2,4,6-trinitrotoluene. Investigation undertaken at the 
request of the Division of Chemistry and Chemical Technology of the 
National Research Council. By James M. Bell and Charles H. HerTy, Jr. 
Reprinted from the Journal of Industrial and Engineering Chemistry, December, 
1919, Vol. 11. Pages 6. Distributed free, postage 1 cent. 
Engineering 
Effect of cold-working and rest on resistance of steel to fatigue under reversed stress. 
Report of research under the auspices of the National Research Council. By 
H. F. Moore and W. J. Putnam. Reprinted from the Bulletin of the American 
Institute of Mining Engineers, 1919, pages 391-404. Distributed free, postage 
1 cent. 
Microstructural features of flaky steel. Report of research under the auspices of the 
National Research Council. By Henry S. Rawdon. Reprinted from the 
Bulletin of the American Institute of Mining Engineers, 1919, pages 183-201. 
Distributed free, postage 1 cent. 
Path of rupture in steel fusion welds. Report of research under the joint auspices of 
National Research Council and Emergency Fleet Corporation. By S. W. 
Miller. Reprinted from the Bulletin of the American Institute of Mining Engi- 
neers, 1919, pages 312-338. Distributed free, postage 1 cent. 
Production of ferromanganese in the blast furnace. Report of research under the joint 
auspices of the U. S. Bureau of Mines and the National Research Council. By 
P. H. Royster. Reprinted from the Bulletin of the American Institute of Mining 
Engineers, 1919, pages 367-378. Distributed free, postage 1 cent. 
Use of manganese alloys in open-hearth practice. Report of research under the joint 
auspices of the U. S. Bureau of Mines and the National Research Council. By 
Samuel L. Hoyt. Reprinted from the Bulletin of the American Institute of 
Mining Engineers, 1919, pages 277-289. Distributed free, postage 1 cent. 
Welding mild steel. Report of research under the joint auspices of the National Re- 
search Council and the Emergency Fleet Corporation. Presented by H. M. Ho- 
