This content is only available as a PDF.

Footnotes

* Abstract of paper in J. of Res. of the Nat. Bur. of Standards, v. 25, no. 3, Sept., 1940, pp. 327–368; issued also as a separate R P 1329, 10 cents, Supt. Documents, G. P. O., Wash., D. C.

Article PDF first page preview

Article PDF first page preview