. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Inn n n ; Outerfb/e Shoe-Inntr PoUShot SECTION OF LIFTING MAGNET. energized magnet. A 10-in. magnet,which is a handy size in a shop, weigh-ing itself about 75 lbs., can support aweight of a ton or more. The lifting electro-magnet, one mightalmost say, is the logical consequentof the electric crane. Cables from thecrane trolley come down to the mag-net, and without being strained, havepractically the same length as the hoist-ing chain of the crane. A cleverly ar-ranged small electric motor ree
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Inn n n ; Outerfb/e Shoe-Inntr PoUShot SECTION OF LIFTING MAGNET. energized magnet. A 10-in. magnet,which is a handy size in a shop, weigh-ing itself about 75 lbs., can support aweight of a ton or more. The lifting electro-magnet, one mightalmost say, is the logical consequentof the electric crane. Cables from thecrane trolley come down to the mag-net, and without being strained, havepractically the same length as the hoist-ing chain of the crane. A cleverly ar-ranged small electric motor reels up- January, 1908. RAILWAY AND LOCOMOTIVE ENG1M 31 the cables as fast as the crane chaingoes up with the load, and again keepspace with the chain when swingingdown for another lift. The switch bywhich current is turned on or off thelifting magnet is within easy reach ofthe operator and is made sufficientlystiff to require a definite and purposiveaction on the part of the man in chargewhen he wishes current to flow. Thechance of the current being accidentally. ^^mm^mrnWM^^-^mM consists largely of silicious limestonein which most of the limestone has, inthe process of weathering, been washedor drained away. The process in natureis not unlike the separation of ashesfrom cinders, which would take placein a pile constantly exposed to therain. The ashes would be said to haveleached out, and rotten stone is whatremains of this fine silicious limestoneafter the greater part of the lime hasleached out. Speaking of the origin of the nameHolystone, the Dundee Advertiser says:At the Reformation, when the Churchof St. Nicholas, at Yarmouth, wasdespoiled, the carved stones of manyof the monuments, both in the churchand outside in the graveyard, wereshipped off—some to Newcastle, to beturned into grindstones, and someon board the ships of the royal navyof the day, to be used in scouring thedecks, whence, it is interesting to know,the seamens term holystoning thedeck takes its origin.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
