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5291. Pentosans. Determination of pentosans in pulps and papers; by Herbert F. Launer and William K. Wilson.

Corporate/Agency Authors:: National Bureau of Standards and Commerce Department
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1199

5292. Petroleum. Chemical constitution of extract portion of lubricant fraction from midcontinent petroleum [with list of references]; by Beveridge J. Mair, Charles B. Willingham, and Anton J. Streiff.

Corporate/Agency Authors:: National Bureau of Standards
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1145

5293. Petroleum. Continuous high-vacuum still and boiling-point apparatus, and systematic distillation of dewaxed lubricant fraction of petroleum; by Robert T. Leslie and Wilson W. Heuer.

Corporate/Agency Authors:: National Bureau of Standards
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1142

5294. Petroleum. Exhaustive fractionation of extract portion of lubricant fraction from midcontinent petroleum [with list of references]; by Beveridge J. Mair and Charles B. Willingham.

Corporate/Agency Authors:: National Bureau of Standards
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1143

5295. Petroleum. Hydrogenation of extract portion of lubricant fraction from mid-continent petroleum [with list of references]; by Beveridge J. Mair, Charles B. Willingham, and Anton J. Streiff.

Corporate/Agency Authors:: National Bureau of Standards
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1144

5296. Petroleum. Separation of 1,2,4-trimethylcyclohexane and isononane from midcontinent petroleum [with list of references]; by Joseph D. White, and Augustus R. Glasgow, jr.

Corporate/Agency Authors:: National Bureau of Standards and Commerce Department
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1173

5297. Petroleum. Summary of investigation of composition of midcontinent petroleum distillate, boiling between 100° and 130° C.; by Robert T. Leslie.

Corporate/Agency Authors:: National Bureau of Standards and Commerce Department
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1174

5298. Photogrammetric mapping. Relation of camera error to photogrammetric mapping; by Irvine C. Gardner.

Corporate/Agency Authors:: National Bureau of Standards and Commerce Department
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1177

5299. Potentiometer. Method of reducing effect of disturbances in galvanometer branch of potentiometer circuit; by Frank Wenner.

Corporate/Agency Authors:: National Bureau of Standards and Commerce Department
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1194

5300. Potentiometer. Potentiometer for measuring voltages of 10 microvolts to accuracy of 0.01 microvolt; by Ray P. Teele and Shuford Schuhmann.

Corporate/Agency Authors:: National Bureau of Standards and Commerce Department
Publisher:: National Bureau of Standards
Date:: [1939.]
SuDoc number:: C 13.22/a:1195

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