. ack of each Lantern ; doubleconvex CondensiDg-Lenses. 4^ inches diameter; first quality Achromatic Ob-convex ^^uu ¥ . jjj ^nd Low-power Combinations; brass Slip-tub«^A^nlSients for focusing; McAlhsters Slide Spring and Stop; T. H. McAl- lIex^sTmproved S Oxy-Calcium Jets, with clamping and elevating Screws L^T^c7inderirDissolvi/g Key; copper Oxygen ^i^^ |^^^ot4r20Spirit Lamp Purifier and india-rubber Tubing, and canvas-hned Gas Bag, 30x4Ux<»Ks sTIallons^^^^^^^ one dozen prepared Lime Cylinders; one charge Chem-i??s for olygen Sec
. ack of each Lantern ; doubleconvex CondensiDg-Lenses. 4^ inches diameter; first quality Achromatic Ob-convex ^^uu ¥ . jjj ^nd Low-power Combinations; brass Slip-tub«^A^nlSients for focusing; McAlhsters Slide Spring and Stop; T. H. McAl- lIex^sTmproved S Oxy-Calcium Jets, with clamping and elevating Screws L^T^c7inderirDissolvi/g Key; copper Oxygen ^i^^ |^^^ot4r20Spirit Lamp Purifier and india-rubber Tubing, and canvas-hned Gas Bag, 30x4Ux<»Ks sTIallons^^^^^^^ one dozen prepared Lime Cylinders; one charge Chem-i??s for olygen Securely packed in substantial dove-tailed packing case wittMnged lidrf^^^^^^^ lid is made with slip hinges, ^^^^^^moved in an instant. This lid serves as a platform for the Apparatus, tte -Dissohjing Key being permanently attached to the inner side qn^ No. 624. Same dimensions, accessories and magnifying powers as No. 623. ^i^h Conca^convex Object Glasses »^uu,uv 23 Geo. H. Pierce, Philadelphia, Pa. OXY-CALCIUM STEREOPTICONS, WITH HOUSE GAS As almost every village and town is nuuj supjjueu aiiiri, public gas works, furnishingcarbureted hydrogen gas, I have contrived a new pattern of Oxy-Calcium Stereopticon,with an attachment to connect with any gas burner, and thus burn house gas in place ofthe alcohol. The light is more intense than when alcohol is used, is more uniform, ismore easily managed, and, at the same time, more economical. In places where there areno gas works, alcohol can be used {as in Nos. 620-624) without any alteration of theApparatus. This form of instrument has proved very popular, and is, perhaps, forgeneral purposes the most desirable style. It is admirably adapted for parlor entertain-ments, Sunday-school exhibitions, ; 24 Geo. H. Pierce, Philadelphia, Pa. No. 625. WITH HOUSE GAS ATTACHMENT. Consisting of Two Lanterns of finely-finished and well-seasoned mahogany, withmetal tops; each fifteen inches long, eleven inches wide, eleve
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectproject, bookyear1888
