Chemical engineering . FIG. 2.—PEBBLE TUBE MILL. dark without dropping it off the carrier or knocking it offthe beam. The hangers are of skeleton construction, similar to thoseused on their button balances and have a maximum carryingcapacity with a mini-mum amount of weight. Two sensitive levelsare set in the metal basein front of the indexand in plain view of theoperator. The case is of Frenchpolished mahogany,with counterpoised slid-ing door in front anda removable slidingdoor in back. A plateglass sub-base coversthe entire top of \11 metal work is goldplated. In the illustra-. January
Chemical engineering . FIG. 2.—PEBBLE TUBE MILL. dark without dropping it off the carrier or knocking it offthe beam. The hangers are of skeleton construction, similar to thoseused on their button balances and have a maximum carryingcapacity with a mini-mum amount of weight. Two sensitive levelsare set in the metal basein front of the indexand in plain view of theoperator. The case is of Frenchpolished mahogany,with counterpoised slid-ing door in front anda removable slidingdoor in back. A plateglass sub-base coversthe entire top of \11 metal work is goldplated. In the illustra-. January, KJ05.] ELECTROCHEMICAL AXU .METALLLRCrCAL IXDUSTRY. 43 tion the counterpoised sliding door has been removed to betterilUistrate the balance. A gold medal has been awarded Ainsworth & Sons for fine balances and weights at theWorlds Fair. St. Louis. Bauxite Brick. In connection with the problem of refractory furnace liningto which we have given considerable attention in the past (es-pecially in our November issue, 1904), a note published inIron Age of December i, is interesting. It refers to a processrecently patented by W. F. Berger, for making refractorybrick out of bauxite. The value of bauxite as a refractorymaterial has been known for several years, but its lack ofcohesive qualities has heretofore prevented its being moldedinto brick. The patent of Berger covers the use of a binderwith calcined bauxite. The new process uses a natural bauxite from Arkansaswhich is particularly low in silica, bonded by a small per-centage of plastic fire clay. The amount of si
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902
