Micrographia : containing practical essays on reflecting, solar, oxy-hydrogen gas microscopes; micrometers; eye-pieces, &c. &c. (1837)
Goring, C. R., 1792-1840, Pritchard, Andrew, 1804-1882, joint author · London : Whitaker and Co. · leaf 216
, a, i, and h, are annexed to thedifferent bladders, and made to communicate with the jet, J.On the upper shelf stands a purifier, hereafter to be described, * Hydrogen being transmissible through most bodies, the bags orbladders should not be filled until wanted for use. SOLAR AMD GAS MICROSCOPES,… … be used when requrired. W W are the weights, or sand-bags,pressing, by means of inclined boards, upon the distendedbladders, and thus, in conjunction with the stop-cocks, actingas regulators for the steady and proportionate supply of thegases. It is scarcely worth mentioning that, during the…
Microscopy
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