Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 332
and up to any de-sired differential pressure and under static pressure upto 1.000 pounds i)er square inch. The construction of this Differential Gauge, which isthe most satisfactory instrument of its kind ever manu-factured, haci made possible the use of Orifice Plates forthe measurement of gas.… … Iiiipr Miif Imeiit. As the actuating tube movements form the important«rt of our Recording instrujnents, we wish to briefly de-cribe those which we are using. The illustration shows our improved Helical Tubelovement which is used in all Foxboro Recordingiauges for ranges above 1- pounds or its…
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