2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/10574Date scanned: 2001-10-19.USBM #44160; Figure 31 Sling psychrometers and cases.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.A psychrometer is used to measure water vapor content in the atmosphere.Rights management statement available at: http://library.mines.edu/digital/rights.htmlMiningStillImage