ide, which latter er-worn house roofs were pierced.—Rev. Horace C. Hovey, features of my invention consist in relieving the floats, will now open in proportion to the rise of the float. The M. A., in the American Journal of Science. when entering the tank, of the pressure of the water column oe… … ber, because previous to starting the machine a vacuum or a But the largest ones were symmetrical ovoids; each being firmly against the seats. A rocking motion of the stem partial vacuum must be formed in it, and afterwards main- surmounted, however, by a roughened crown, Fig.2. The will then…
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