The young folk's cyclopædia of games and sports ; (1899)
Champlin, John Denison, 1834-1915, Bostwick, Arthur Elmore, 1860-1942, joint author · New York, H. Holt and company · leaf 276
The reason is, thatthe breath is kept together in astream by the straight hole, whereasit disperses to all sides in the conicalhole, and carries with it some of theair on the other side of the board sothat a slight return current is caused.This principle is used in ventilatingrooms where it is…
Games · Sports · Card games
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