. American engineer and railroad journal . occupants are rea-sonably healthy and remain al rest. Bu1the absolute air volume to be suppliedcannot be specified with certainty in ad-ranee, wit bout a t borough knowledge ofall the conditions and modifying circum-stances; in fact, the climate, the construction of the building, the size of therooms, the number of occupants, theirhealthfulness and their activity, ti thi iwith the time during which the roomsipled, all have their direct inUnder all t hi e i onditions, itis readily -ecu thai no standard allow-ance Can be made to >uit all (ileum- itan
. American engineer and railroad journal . occupants are rea-sonably healthy and remain al rest. Bu1the absolute air volume to be suppliedcannot be specified with certainty in ad-ranee, wit bout a t borough knowledge ofall the conditions and modifying circum-stances; in fact, the climate, the construction of the building, the size of therooms, the number of occupants, theirhealthfulness and their activity, ti thi iwith the time during which the roomsipled, all have their direct inUnder all t hi e i onditions, itis readily -ecu thai no standard allow-ance Can be made to >uit all (ileum- itances, and result* will be satisfactoryonly In so far t Ingly, with the knowledge of the variousreqnirt m have here bi en, ma! et ra< ii allowam i Ea trai fromIon and u, r . hi, U \ ant Com\ any Boi U i New Tooi Steel, The Sheffield ixuiuIndependent tate that the Sheffield SteelLtd . are putting a new toi ■ int and ::■ ing between Mu hett and the best highea II bai dened and canbe sold at. a very reasonable I2-1R. BTANDABD BOR1 I D fUBNINO MILL, WITH iv\,. ,u i\ I 11 306 AMERICAN ENGINEER AND RAILROAD JOURNAL. works prevents breakage of the gears or mechanism by care-less handling of the heads. A constant speed motor may be mounted on a bracketat the side of the machine and connected to the top shaft byeither a belt or silent chain, or a variable speed motorhaving a speed range of one to four may be direct connectedby either gearing or silent chain to the head stock drivingshaft, thus doing away with the cones. The net weight of thismachine, which is made by the Bullard Machine Tool Com-pany, Bridgeport, Conn., is 11,000 lbs. the spindle to the base plate is 72 inches and the spindle has20 ins. of traverse. SIX-FOOT UNIVERSAL RADIAL DRILLING MACHINE. The 6-ft. full universal radial drilling machine, illustratedherewith, while designed specially for the use of high speeddrills, has a sufficient range of spindle speeds to adapt it forthe use of carbon s
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
