On the smokeless fire-place : chimney-valves, and other means, old and new, of obtaining healthful warmth and ventilation (1855)
Arnott, Neil, 1788-1874 · London : Longman, Brown, Green, and Longmans · leaf 178
ide without sensible obstruction, having only topush forward the light curtain; but air could notpass from the side where the curtain was, because theattempt would press the curtain against the gauze,and so completely shut the passage. In the supposedexperiment made in the wide house-passage,… … wood like a packing-case, made accurately square,resting on its side. Within the case is a moveable par-tition E F, fitting the box like the piston of a pumpto within the 20th of an inch on all sides, so that itmay be pushed to and fro with little friction andimpediment. This moveable partition has…
Heating · Ventilation · Fireplaces
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