Show TII Iruln hr lIImODII Diamond powder and ehlpt and oven the finest dust are of great value In tho rafohanlenl arts llrailllan diamonds aro now put lo a novel nnd Interesting use A thin disk ot steel seven tent In diameter haa since nt Intervals ot about one and onehalt Inches Thco spaces ore mini In with piece of steel that einctly nt and Into these are act the dla monJs fixed In rountcriunk mew > heads They nro arranged groups ot eight and aro to placed tbat they do not follow ono exactly after the other In Ibo cut but each line takes Its own coune Mils circular saw U I med for cutting up block of stone and to efficient effi-cient la It that In lees than two and one bolt peons It hat cut out four hundred and twenty thousand square feet ot alone nt n rest of a trifle bras than lo cent a square foot In thla limo It has been necessary lo renew twenty ot the teeth tho avcrago roil ot which hat been about two dollars per tooth |