In Vol. 27, No. 5, May 20, 1944, page 403, in the eighth line from the bottom of the page, the comma after "intensity" should be a semicolon.
On page 413, in the second formula from the bottom of the page, for
See PDF for Equation
read
See PDF for Equation
On the same page, formula 2 should read
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On page 414, line 3, at the end of the line add "or" to read "of the level of I or of F."
On page 422, in the first line below the figure legend, for "illuminate" read "illuminated."
On page 430, line 22, for "lighteb dars" read "lighted bars."
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Copyright, 1944, by The Rockefeller Institute for Medical Research
1944
