Double U-tube Small 58×320 Medium 116×640 Large 185×1024 Download Tiff Original 434×2400 | (137.8 KB) Description "U-tube used in pressure experiments." -Avery 1895 Keywords experiments, pressure, tube, u Galleries Chemistry Apparatus Source: Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 161
