The little gold mine. Conklin's handy manual of the mechanical arts and house plans .. (1889)
Conklin, [George W.] [from old catalog] · Chicago, Laird & Lee · leaf 389
s tohave the top and bottom open, we shall have a circulation.Or if we open a door and hold a candle at the top and thenat the bottom, we will see the same circulation illustrated bythe cold air flowing in at the bottom and the hot air out atthe top. These experiments furnish the natural laws… … filth, are all poisonous, and, being heavier than pure air, sinkto the bottom of a room by gravitation. It is a gross errorto suppose, as many do, that the foul air rises to the ceilingand remains there. The sickness and death of children, oftenattributed to other causes, arises from…
Industrial arts · Workshop recipes · Architectural drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-1167-519.webp)
