- Letter from Frank B. Jewett, President of the National Academy of Sciences, to LP. Invites LP to attend the dinner that the Council of the Academy, the Chairman of the National Research Council, and he are holding on March 9th before the meeting of the Research Board for National Security. [Letter from LP to Jewett, February 28, 1945] LP Safe: Drawer 3, Folder 3.022
- Letter from LP to Commander Chalmers L. Gemmill, US Naval Air Training Center. [Letter from Chalmers to LP January 30, 1945] [Filed under LP Science: Scientific War Work - Materials re: the Pauling Oxygen Meter, 1940-1947: Box #13.001 Folder #1.1]
February 12, 1945
Commander Chalmers L. Gemmill
U. S. Naval Air Training Center
School of Aviation Medicine
Dear Commander Gemmill:
I believe that the answer to the questions in your letter of 25 January 1945 can be expressed in the following way. Our oxygen meter indicates directly the partial pressure of oxygen, under the conditions in which the oxygen is introduced into the meter. The reading of the partial pressure of oxygen is essentially independent of the presence or absence of other gases.
Inasmuch as the instrument indicates the partial pressure of oxygen in a gas, the reading of a gas mixture containing water vapor should be changed on removal of the water vapor to a value greater by division by the quantity one minus the ratio of the water vapor pressure to the total pressure. If the instrument is kept at body temperature, then the ratio would be as indicated in your letter; if, however, the instrument is at a lower temperature, the correction factor would not be so great.
The answer to your last question about the reference pressure for the instrument is that the instrument always indicates the partial pressure of oxygen in absolute pressure units, either millim[e]ters of mercury or fractions of a normal atmosphere, depending upon how your instrument is calibrated. The fraction of oxygen in the gas under investigation would then be obtained by dividing the reading of the instrument by the total pressure of the gas under the conditions on measurement.
cc: to Dr. Arnold O. Beckman
- Letter from LP to Dr. F. W. Willard. RE: Understands that Hurd would essentially create a new book. [Filed under LP Science: American Chemical Society: Correspondence, 1943-1948: Box #14.003 Folder #3.3]
- Letter from William Astbury to LP RE: Once again asks about the use of Hollerith machines, requesting a sample pack of 11 cards from the Cal Tech machine to see if they will be compatible with those at the his university in England. Also asks for information on how they deal with the method of least squares as used by Hughes. [Letter from LP to Astbury, December 6, 1943] [Filed under LP Correspondence: Box #6.18, file:(Astbury, William T, 1937-1961)]
- Summary of Immunochemistry for January 1945 [Filed under LP Biographical: Academia, California Institute of Technology: Assorted Financial Materials: 1930-1950: Box #1.031, Folder 31.1]
- Summary of NDRC Chem-13 from January 1, 1943 through January 31, 1945. [Filed under LP Biographical: Academia, California Institute of Technology: Assorted Financial Materials: 1930-1950: Box #1.031, Folder 31.1]
- Summary of NDRC Chem-15 from October 1 through January 31, 1945. [Filed under LP Biographical: Academia, California Institute of Technology: Assorted Financial Materials: 1930-1950: Box #1.031, Folder 31.1]
- Telegram from LP to Dr. Homer Smith, New York University. RE: Recommends inviting representatives from USC, Stanford, and UC to the Chicago meeting. [Filed under LP Science: Assorted LP War Work, 1940-1946: Box #13.006 Folder #6.4]