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T H E J O U R N A L OF IhTDb-.STRI,4L A N D ESGI-VEERIAYG C H E M I S T R Y .
brought as close t o the crucible as desired by blocks of wood of different thicknesses. The burner can be removed and replaced b y the blast lamp and the crucible blasted if desired. The triangles employed have been for the most part the Hoskins chemists’ triangles (made of a special nickel alloy) or those of vitreous quartz. The apparatus has the following advantages : (I) By using triangles of the materials just mentioned the crucible has perfectly clean surroundings, and the clean smooth soapstone furnishes an excellent surface on which to cool the crucible after a fusion or t o rest the lid while examining the contents of the vessel. ( 2 ) The apparatus is compact and is, hence, very convenient for ignitions or fusions while making the same determinations on different samples since they can be kept in order and similarly treated without the operator having to change his position. The apparatus, as described above, has been in use b y the writer in the laboratory of the Virginia Geological Survey for two years and has proven very convenient and entirely satisfactory.
GAS KILN FOR FIRING ORNAMENTAL GLASS.’ The accompanying photograph shows the construction of a kiln for firing ornamental and stained glass, designed by the Laclede Gas Light Company, St. Louis. A track is extended on each end the full
length of two trays to make possible the use of more than one tray for the purpose of continuous firing. The arched ceiling is constructed of fire brick, and the Bulletin National Commercial Gas Association April. 191 1
May,
1911
interior surface of the walls, exposed in the firing c h a m b q is faced with the same material. There are two manifolds of fifteen burners each, one along each side of the kiln, the burners being placed through pipe castings in the walls so that the flames are projected horizontally on a plane about II/* inches over the stock to be fired. T o avoid disturbing and cooling air currents, the end openings and those about the tray, also the vent above, are shut off to a point where perfect combustion and proper temperature are obtained. Atmospheric burners of about 50 cubic feet per hour capacity each, of needle valve type, are used, and from these the maximum consumption is from I , Z O O - I , ~ O O cubic feet of gas per hour. The tray or carrier is especially constructed to insure against warping and bending due to the high temperature, 2 , 1 0 0 ~F. has been attained. AUTOMATIC LIQUID SAMPLER. B y G. L. SPEXCER.
Received March 27, 1911
In THIS J O U R N A L , 2 , 2 5 3 ( I ~ I O ) , I described a n automatic device for sampling juice in cane sugar factories. M i . August Wedderburn, superintendent of this company’s “ Tinguaro” factory, has slightly modified this sampler, thus making it applicable in with. drawing liquids from pipes under heavy pressure. The construction of the sampler is sufficiently de-
scribed in the accompanying cut from a working drawing. Obviously, the sampler should be operated b y a mechanism that enables it to always draw the same
