Canadian engineer . top of it and rolled in until the matrix entirely fillsup the interstices and comes to the surface. When the road has become thoroughly packed by therollers, a grout appears from the matrix below, so provingthat all cavities have been fill d. A thin coating of limestone,is spread over the road to absorb the excess of solution andto form a cushion for the horses feet while the process ofsetting goes on. Traffic is not impeded during construction. The Rocmac solution is a s-lico-saccharate. It containsno asphalt, pitch, tar or oil and is entirelv harmless to sur-rounding prop
Canadian engineer . top of it and rolled in until the matrix entirely fillsup the interstices and comes to the surface. When the road has become thoroughly packed by therollers, a grout appears from the matrix below, so provingthat all cavities have been fill d. A thin coating of limestone,is spread over the road to absorb the excess of solution andto form a cushion for the horses feet while the process ofsetting goes on. Traffic is not impeded during construction. The Rocmac solution is a s-lico-saccharate. It containsno asphalt, pitch, tar or oil and is entirelv harmless to sur-rounding property during the laying^ or after the completionof the road. There is no unpleasant odor or damage to vege-tation,, vehicles or clothing. The surface of the road whenfinished has the apT>earance cf an orinary macadam point in favor of Rocmac which will be thoroughU- appre-ciated by Canadian en Mers in som« sectons cf the coun-trv is that it can be laid in anv weaher. June 20, 1912. THE CANADIAN ENGINEER 73. The Largest Direct Connected CentrifugalPumping Unit in Britisit Coluntltiam The Vancouver Power Company haverecently installed at their v/orks at CoquitlamDam, , the largest direct connectedcentrifugal pumping unit in British outfit is to operate in parallel with anumber of other pumps that are to furnishwater under pressure for sluicing into placethe material for their new pump is a 10-inch, class F, two-stage centrifugal, with bronze inpellers andrenewable bronze diffusion vanes. It has anormal capacity of 1833 imperial gallons perminute when operating at I 160 againsta total head of 355 feet or an equivalentpressure of 154 lbs. per square inch. It ismounted on a common sub-base with a type B, Fairbanks-Morse squirrel cage,induction motor, 2200 volts, 60-cycle, 3-phase, 1160 at full load, being direct con-nected thereto by means of a flexible leatherlink coupling The motor possesses a feature in rotor con-structio
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
