| http://www.w3.org/ns/prov#value | - Compound Blotv-pipe of Dr. Hare, invented in 1821, an instrument iu which oxygen and hydrogen, propelled by hydrostatic or other pressure, coming from separate res- ervoirs, in the proportions requisite to form water, are made to unite in a capillary ori- fice, at the moment when they are kindled.
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