patent of Glazebrook, 1801, and Laubereau, 1859; and the United States patent of the latter dated 1849.
Those engines in which the air or gas is not expended, but occupies two reservoirs commupowder in quantity sufficient to generate the same projective force.
Shaw's air-gun, patented in 1849, combines an endless band of vulcanized indiarubber with an air-exhausting apparatus; the electri square meshes alternately.
The name given to an instrument invented about 1849, by M. Boland, a Parisian baker, for determining the quality of the gluten in different specimens, or moving automatons which require a supply of water to make them constant.
In 1849 N. B. Ward grew sea-weed in artificial sea-water.
A great aquarium, one hundred and fifty feet l boring-apparatus was constantly turned by hand-power.
The boring was commenced in the spring of 1849, and continued at intervals till March, 1855.
For performing all the work connected with the bor