Practical radiography : a handbook for physicians, surgeons, and other users of X-rays (1901)
Isenthal, A. W, Ward, H. Snowden (Henry Snowden), 1865-1911 · London : Published for The Photogram, Ltd. by Dawbarn and Ward, Ltd. · leaf 35
that by simply turning a handle 26 Practical Radiography- various combinations of the accumulator cells may be madeto suit the conditions of charging and discharging. Fig. 6 represents a portable accumulator with its pachy-trope attachment, the latter being at the same time soarranged that the… … Fig. 6. The thermopile must have been heated up for sometime before it is thrown into circuit, but once set workingit will continue to generate current at a uniform rate with-out any further attention provided the gas burners are allalight and the flames maintained at their proper size. In order to…
Radiography · X-rays
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