Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 394
hree. Fig. 100 shows thecommon form of index in a dry meter. The small index hand D, onthe upper dial, is not taken into consideration when reading the meter,but is used merely for testing. The three dials, which record the con-sumption-of gas, are marked A, B, and C; and in each, a complete…
Architecture · Building · Carpentry
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