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Description
Access to this collection is generously supported by Arcadia funds. According to the Library of Congress Catalogue of Copyright Entries, these cards were published in 1931. Enclosure and three cards for calculating the capacity of Wilgus gas regulators, produced by Natural Gas Equipment Inc.: (1) Enclosure: "Pioneers in gas pressure regulation." Catalog no. 101. Copyright Feb. 17, 1931; (2) "No. 1 rapid capacity calculator for Wilgus regulators." Directions. Card with revolving disc in envelope. Copyright Feb. 17, 1931; (3) "No. 2 rapid capacity calculator for Wilgus regulators." Directions. Card with revolving disc in envelope. Copyright Feb. 17, 1931; (4) "Rapid flow calculator for anubis differential pressure recorders..." Text from negative sleeve: Wilgus Gas Gauge #96.
Type
Format
b&w negative
Identifier
uclamss_893_0009 ark:/21198/zz002j8xf2
Subject
Gas industry--California Gas-governors Wilgus Manufacturing Company
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