* For Sale by Superintendent of Documents. Paper, 25c. single copy, $1.00 a vol. (4 nos.).
Notes:
CONTENTS.—Determination of degree of uniformity of bars for magnetic standards; [by] Raymond L. Sanford.—Thermoelectric measurement of critical ranges of pure iron; [by] George K. Burgess and H. Scott.—Study of electromagnet moving coil galvanometers for use in alternating-current measurements; [by] Ernest Weibel.—Standard substances for calibration of viscometers; [by] Eugene C. Bingham and Richard F. Jackson.—"Average eye" for heterochromatic photometry, and comparison of flicker and equality-of-brightnees photometer; [by] E. C. Crittenden and F. K. Richtmyer.—Emissivity of straight and helical filaments of tungsten; [by] W. W. Coblentz.—Aneroid calorimeter for specific and latent heats; [by] Nathan S. Osborne.—Wave lengths of stronger lines in helium spectrum; [by] Paul W. Merrill.
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* For Sale by Superintendent of Documents. Paper, 25c. single copy, $1.00 a vol. (4 nos.).