dors, and that we may window are necessarily washed, and for this reason the glass, mica valves, opercula, etc. In England, where breathe therein as in the open air. So the fundamental air that traverses them doesnot become charged withany much attention has been paid to this subject for a… … ance, and possesses the same inconveniences as those just mentioned. Figs. 3 and 4._EFFECTS OF BLOWING AIR THROUGH A Figs. 1 and 2-EFFECTS OF AIR BLOWN THROUGH CYL- Prof. Emil Trelat, of the Conservatory of Arts and INDRICAL AND CONICAL APERTURES. CONICAL APERTURE IN BOTH DIRECTIONS, Trades, has…
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