Scientific American Volume 88 Number 10 (March 1903) . bring the level of the liquid into axial alignmentwith the horizon glass and the eyepiece. On sightingthrough the eyepiece the observer can easily determinewhether the sextant frame is held in proper position;for when slightly tilted the surface of the liquid in oneleg of the device will rise higher than that in the otherleg, and not until a proper position is reached willthey both perfectly coincide with the axial vision. This device will be found particularly useful atnight or on occasions when the natural horizon isblurred from the sigh
Scientific American Volume 88 Number 10 (March 1903) . bring the level of the liquid into axial alignmentwith the horizon glass and the eyepiece. On sightingthrough the eyepiece the observer can easily determinewhether the sextant frame is held in proper position;for when slightly tilted the surface of the liquid in oneleg of the device will rise higher than that in the otherleg, and not until a proper position is reached willthey both perfectly coincide with the axial vision. This device will be found particularly useful atnight or on occasions when the natural horizon isblurred from the sight, or, if used on land, when thetrue horizon cannot be determined by reason of irreg-ular topography. By making the artificial horizon inthe form of an endless tube, no errors will result byreason of unequal air or vapor pressure in the twolegs of the device. A NEW ACID CHAMBER FOR SULPHITE WORKS The acid chamber illustrated herewith—the inven-tion of Mr. William A. McKee, of Hinckley, N. Y.—isdesigned to cause a thorough mixing of the lime water. A NEW ACID CHAMBER FOR SULPHITE WORKS. end the sulphur dioxide gas in forming the bisulphiteof lime liquors needed in the sulphite process of mak-ing pulp. The mixing chamber consists of a water-jacketedcylinder, 1, containing conical hoppers, 4, hung frombrackets oa the interior wall of the cylinder, which isof thin sheet lead. Interspersed between these hop-pers, but mounted on a revoluble central shaft, are Scientific American similar inverted cones, 3, adapted to act as splashersand to spread the lime-water as it trickles down anddash it, by centrifugal force, against the wall of thecylinder, whence it flows into the next hopper andfrom there on to the next cone, etc. The gas is drawn in through pipe, 2, by means of thefan, 6, and it follows a sinuous course around theouter edges of one set of cones and through the centerof the other set, thus coming into intimate contactwith the lime-water, and being absorbed by it. Anygas th
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectamerica, bookyear1903
