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Scientific American, Vol. 52, No. 5 (January 1885) (1885)

leaf 4

An illustration from Scientific American, Vol. 52, No. 5 (January 1885), 1885, leaf 4
compactness of the pump may be gained the bubble when the level is perfectly horizontal, thus growing near. Attached to the beams, A, of an ordi- when it is stated that the floor space occupied is only 6 facilitating the taking of true levels. If two inclined nary cultivator are the forward… … tained well fumigated with chlorine gas, two good fumigations up to a marked pungency in the six hours ELCE'S COMBINED GUARD AND WEEDER. TYLER'S SPIRIT LEVEL. being required. It was also found that one good fumi- gation with chlorine neutralized effectually the virus which is about 8 inches high…

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