. American engineer and railroad journal . es to catch any hydro-chloric acid that may come out of the condiustion tube, orfrom the ferrous sulphate bubble tube. The solid)ility of thesilver sulphate being rather meager, it is desirable to ailil someof the solid salt to the b\d)ble tube in order to prevent (henecessity of too fretpient charging of this tube. Next bejondthe silver sulphate bubble tube is an ordinary chloride of cal-cium tube. In order to save space, we prefer the LI is the absorption potash bulb. We prefer the Geislerform, and have them made so that when filled they,
. American engineer and railroad journal . es to catch any hydro-chloric acid that may come out of the condiustion tube, orfrom the ferrous sulphate bubble tube. The solid)ility of thesilver sulphate being rather meager, it is desirable to ailil someof the solid salt to the b\d)ble tube in order to prevent (henecessity of too fretpient charging of this tube. Next bejondthe silver sulphate bubble tube is an ordinary chloride of cal-cium tube. In order to save space, we prefer the LI is the absorption potash bulb. We prefer the Geislerform, and have them made so that when filled they, with theprolong, weigh from .^0 to flO grams. The ordinary size weighsfrom 80 to 90 grams. Next is the prolong, which is simply asmall chloride of calciimi tube filled with gnmulaled chlorideof calcium only. Next isanollier ordinary chloride of calciumtube to ])rotect the prolong from moisture from the .aspiratorbottle. This bottle finishes the train. It is provided, as willbe observed, with inlet at the top and side outlet at the bottom,. Fig- 3 observed, a simple 13-in. Fletcher furnace, fitted with a combustion tube s in. in diameter and 20 in. long, whichcontains gramdatcd oxide of copper for about S or 10 in. of itslength inside the furnace. A second comliustion furnace woulddo equally well for a preheating furnace. The corks usedwith this and also with the furnace are rubber ;also rublier tubes are used for connections. The placing of theporcelain tul)e in the preheating furnace should be such thatnot less than 4 or 5 in. of its length projects toward the com-bustion furnace, so that this end may not become heated, withconsequent danger of volatilizing hydrocarbons from the rub-ber cork ; also, to prevent overheating of the porcelain tube,the gas holes in the gas tube of the preheating furnace arestopped up aliout ii in. each way from the ends. Next be-yond the preheating furnace is an ordinary Geisler potashbulb, which may be called the purifying
Size: 2872px × 870px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
