The Huttig news., 1909-07-10
HARDEST SUBSTANCE MADE
Corborundum Which Does the Work of
 Diamond Dast Inexpensive.

marvel of the scientific genius of the age became an accomplished fact. but few have even dreamed of the colossal energy. that is released by the harness" {"
 The hardest substance known. next to the diamond and this crys- tai is the handiwork of man. not of nature. This substance is not found, in all the realm of nature. yet learned geologists have af- firmed, at first sight, that crystals of which it is composed, have been in the earth for million years.
 twill cut glass like a diamond and has taken the place of diamond dust in the polishing of gems and it has entered into the great process es of manufacture, as the most perfect abrasive material that has ever been discovered.
 This substance is called corbor- undum and it is produced by the combination of such simple and commonly known materials, as sand, salt, coke and .sawdust, which is placed in great furnaces, to which a heat of approximately c. 900 degrees Fahrenheit is applied continuously for thirty-six hours.
 This heat is secured by an cleo trical energy of 1000 horsepower, which means 56,0OO horsepower for the run of thirty six hours. This incomprehensible heat is ob- tained from the electricity. furn- ished by the Niagara Falls power plant. The Carborundum compa- ny is located at the Falls and uses 5000 horsepower for five fur naces.
 The first practical use which was made of carborundum was it's application to gun polishing. When the new crystal was fifst placed on the market diamond dust which was the only material ayailably for polishing precious stone. was worth $1.5OO a pound. Jewellers now buy carborundum for ten cents a pound.
 Every article that must be ground or polished. is finished for it's destined work by application to the carborundum wheel. A cast iron cylinder, g inches in length, and 45s cubic feet in diameter, was reduced s of an inch in diam eter in 9 minutes, thus abrading more than 8 cubic inches of cast iron with contact with a carborun- dunn wheel. This is an example of the marvellous achievements of the substance in practicle use.
 Manganese steel, the hardest of metals. employed in burglar proof safes. which will resist any steel tool that can be devised, is ground down by carborundum without the least difficulty. It grinds car- wheels, chilled rollers, chilled iron blow points, valves. chilled balls for ball bearings and it is now used exclusively for polishing marble and granite.
 The most delicate surgical insru- ments and optical lenses are ground to the utmost fineness and delicacy by the carborundum wheel. Glass tumblers and plate glass beveled by this substance. which saves two landings.
 The steps to the Brooklyn Bridge .,and various Subway stations are ifssid with carborundum, it being the only substance which does not wear rapidly under the pressure of countless feet.
 Dentistry is indebted to it and likewise the ordinary citizen, for the narrowing excavations for archaeological remains in the mouth are now performed in period of time reduced by two thirds from what it used to be. Carborundum wheels are made from the size of pin head, mounted on a spindle for