Show STONECARVING MACHINERY Elaborate Decorations Chiseled With a Pneumatic Tool 4 V Mr Charles Barnard In a comprehensive comprehen-sive article In the Century on The Industrial In-dustrial Revolution of the Power Tool I gives this picture of the work not yet fully completed on the new Appellate courthouse Madison square New York city I cityThe V The marblecarver can for a sh < irt time give thirty blows a minute With his wooden mallet on his chisel his average speed is probably less With a pneumatic hammer he can strike 200 2000 3000 or GOOD blows In one minute without the slightest exertion on his part lie can regulate the number of blows In each minute at will V His fly ing hammer fits any form of chisel used in his art It will enable him to do any work he can do by hand and many things that would be Impossible without with-out his nervous little hamnier His hand eye and mind aro now free to give their whole attention and skill to guiding the chise All the labor one half of the total labor of striking the blow on the chisel Is released Just that amount of mental and physical energy en-ergy is released to work In the real art which is the guiding of the tool VAn V-An example of the economy thus afforded af-forded Is found in the elaborate exterior decorations of the Appellate court at9 ly erected on Madison square KeV Yorlc city The building is of steel frame with white marble facings V As required by law a massive timber stage or platform was erected over the sidewalks and on this the stone bricks steel beams and other material were deposited while being prepared for the steam derrick that lifted each piece Into place Tho blocks of marble arrived already squared shaped and fitted so that the work of the builder consisted niercly in putting them In place in the wall All the blocks that were to he decorated capitals lintels panels sides of windows In fact every block that was to carry any part of the ornamental work was left rough and was set hi the wall just as it came from the marble yard As the walls were erected a wooden staging was placed before them for the convenience of the marbleworkers On the platform stood a small shed sheltering a twelve horsepower horse-power gas engine operating an air compressor com-pressor From the compressor wrought Iron pipes extended all over the staging stag-Ing At Intervals there were little hydrants hy-drants to which rubber hose could be easily attached Here we have the distribution dis-tribution of power clearly Illustrated The gas engine using street gas has a distinct advantage over the steam engine en-gine as its fuel is brought in a pipe Instead of a cart and it has no ashes to annoy the passer below In fact wero It not for tho barking of its exhaust ex-haust pipe one would never Imagine that a power plant was at work overhead over-head At one time eighteen marble workers were employed on the building Each one had beside him a plaster copy of the decoration he was to reproduce in the marble His light steel hammer with its swiftlyflying chisel cut tho marble easily surely evenly Rose and leaf lintel curving line flowing tracery and flowering capital grew as if hy magic under his hand The beautiful forms of the pattern or model appeared with Incredible speed The chips flew In a fine shower of white dust under the lightninglike hammer The long flex loin h 1 Cn n hlnl t hI nrmn I n lllnll u in any position and hold the tool at any angle and its tireless energy relieved him from everything except the skilled work of guiding the tools He could stop in an Instant and change the tool In less than a minute Tho workman is no longer a skilled laborer heIs an artisan with a new tool that relieves him from all labor |