* For Sale by Superintendent of Documents. Paper, 25c. single copy, $1.00 a vol. (4 nos.).
Notes:
CONTENTS.—Correlation of magnetic and mechanical properties of steel [with bibliography; by] Charles W. Burrows.—General design of critically damped galvanometers; [by] Frank Wenner.—Interference measurements of wave lengths in iron spectrum (3233A-6750A); [by] Keivin Burns, W. F. Meggers, and Paul W. Merrill.—Relation between composition and density of aqueous solutions of copper sulphate and sulphuric acid; [by] H. D. Holler and E. L. Peffer.—Protected thermoelements; [by] Arthur W. Gray.—Interlaboratory photometric comparison of glass screens and of tungsten lamps, involving color differences; [by] G. W. Middlekauff and J. F. Skogland.—Investigation of laws of plastic flow; [by] Eugene C. Bingham.
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* For Sale by Superintendent of Documents. Paper, 25c. single copy, $1.00 a vol. (4 nos.).