Excerpt from Deep Hole Drilling It is well known that a long, or deep, hole - that is, one long in proportion to its diameter - is best roughed out and finished

Excerpt from Record of Deep-Well Drilling for 1905 Artesian Well and Supply Company, Dyer and Friendship streets, Providence, R. I Ashworth, A. J Alice, Tex. Ab

Excerpt from Well-Drilling Methods The less familiar methods as well as those commonly used are dis cussed, for though the unusual methods are Of restricted use