Barometer Small 53×320 Medium 106×640 Large 170×1024 Download Tiff Original 399×2400 | (153.7 KB) Description A barometer showing the amount of pressure at 760 millimeters of mercury (mm Hg), one standard atmosphere. Keywords 760, Barometer, mm Hg, one atm, one atmosphere Galleries Chemistry Apparatus Source: Brownlee, Raymond B., Fuller, Robert W., Hancock, William J., Sohon, Michael D., Whitsit, Jesee E. First Principles of Chemistry (Boston: Allyn and Bacon, 1907) 12 Courtesy the private collection of Roy Winkelman
