. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . tion shows the general appearanceof the tool, and its capacity in steel is1 in. and smaller. It is operated in anyposition. Its extreme height is 40 insThe greatest distance from spindle tobase is 28 ins., but the tool can be madeto order as far as length is distance from the column to thecenter of spindle is &H ins. The col-umn is 2J4 ins. in diameter and is madeof steel tubing. The hole in spindle isNo. 3 Morse taper. The travel of spin-dle is 5 ins., and is operated by rackan
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . tion shows the general appearanceof the tool, and its capacity in steel is1 in. and smaller. It is operated in anyposition. Its extreme height is 40 insThe greatest distance from spindle tobase is 28 ins., but the tool can be madeto order as far as length is distance from the column to thecenter of spindle is &H ins. The col-umn is 2J4 ins. in diameter and is madeof steel tubing. The hole in spindle isNo. 3 Morse taper. The travel of spin-dle is 5 ins., and is operated by rackand pinion, which in turn is actuatedby a worm and gear, making a powerful feed. The spindle has a quick re-turn when desired. There are twospeeds, and the change from one speedto the other is instantly obtained byshifting a knob. The company have Bell Making. The best bell metal is composed of 78parts of copper and 22 of tin. The use ofsilver in the manufacture of bells is purelyimaginary. The theory grew out of apractice at the casting of church bells;pieces of silver were supposed to be mixed. ELECTRICALLY DRIVEN TWO-SPEEDDRILL. issued a folder which they will be happyto send to anyone who is desirous ofhaving one. May, 1911. RAILWAY AND LOCOMOTIVE ENGINEERING. 217 Latest Mallet Articulated Compound on the B. ® 0. On page 283 of our June, 1904, issue weshowed a heavy articulated compoundfor the B. & O., built by the AmericanLocomotive Company. This month we areable to show a still heavier engine of theMallet articulated compound class,which has just been delivered to theBaltimore & Ohio by the same former engines had cylinders 20and 32 by 32 ins. The ones here illus-trated are 26 and 41 by 32 ins. andwith a steam pressure of 210 His. and with diameter and with the superhi . they provide sq. ft. Thefirebox contributes sq. ft, so tha(the total .nine, up to sq. ft. Thegrate area is figured to be sq flwhich is so close to 100 that i
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