Show ROCK DRILLS rock drills design and use is the title of a new work by eustace W weston associate school of mines ballarat ballaran Ball arat reef lecturer on mining transvaal university college this work embraces pages paged and is profusely and handsomely illustrated it is a work from the pen of a master of drilling operations covers a wide range of drill application and should appeal to every mine owner every man working in tunnel face shaft drift or to the day laborer as well as to the contractor the index of contents shows that the subject is well covered it is as follows I 1 historical sketch II 11 standard piston drills ill III hammer drills IV electric drills V operating rock drills on the surface and underground VI piston drills designed to use air expansively VII philosophy of the process of dr drilling ill rock VIII repair and maintenance of rock I 1 drills a IX ik explosives and their use X drill steel and drill bits XI theory of blasting with high explosives plo XII example of rock drill practice africa and australia XIII example of rock drill practice america XIV rock drill tests and contests XV dust and its prevention antion XVI notes on the use of compressed air cloth bound 4 express paid send orders to the mining review box 1137 salt lake utah |