In another column of this paper may be found the advertisement of T. H. Leavitt, of Boston, for information concerning the boring of artesian wells. Mr. Leavitt has already accumulated a vast amount of information on the subject of deep borings, and in due time he will publish a volume on this topic, if sufficient practical information can be obtained. We are not aware of any good work on artesian wells, and we trust those interested will respond to Mr. Leavitt's call as set forth in his advertisement, so as to enable him to furnish a work on this subject which will be of national benefit.