When a tailor makes a coat he warrants it to fit, and when a surgeon sets a leg unscientifically he is also responsible in damages to his patient, and as is an attorney for negligent practice. Holding examiners responsible will leave the patent office open to the filing of new claims at the same time that it will prevent a world of litigation, favoritism and corruption. We are not striking at our present worthy Commissioner, Mr. Burke. We are friendly to him. But the more honest a man may be, the sooner will he find himself displaced, if the office he holds may be used to grasp a vast amount of patronage and property.' ADVERTISEMENTS. [**hand pointing right]This paper circulates in every State in the Union, and is seen principally by mechanics and manufacturers. Hence it may be considered the best medium of advertising, for those who import or manufacture machinery, mechanics tools, or such wares and materials as are generally used by those classes. The few advertisements in this paper are regarded with much more attention than those in closely printed dailies. Advertisements are inserted in this paper at the following rates: One square, of eight lines one insertion, $ 0 50 " " " " two do., 75 " " " " three do., 1 00 " " " " one month, 1 25 " " " " three do., 3 75 " " " " six do., 7 50 " " " " twelve do., 15 00 TERMS:--CASH IN ADVANCE. * * * * * GENERAL AGENTS FOR THE SCIENTIFIC AMERICAN. New York City, Geo. Dexter " " Wm. Taylor & Co. Boston, Messrs. Hotchkiss & Co. Philadelphia, Messrs. Colon & Adriance. LOCAL AGENTS. Albany, Peter Cook. Baltimore, Md., S. Sands. Cabotville, Mass., E. F. Brown. Hartford, Ct., E. H. Bowers. Lynn, Mass., J. E. F. Marsh. Middletown, Ct., Wm. Woodward. Norwich, Ct., Safford & Parks. New Haven, Ct., E. Downes. New Bedford, Mass., Wm. Robinson & Co. Newark, N.J. J. L. Agens. Patterson, N.J., L. Garside. Providence, R.I., H. & J. S. Rowe. Springfield, Mass., Wm. B. Brocket. Salem, Mass., L. Chandler. Troy, N.Y., A. Smith. Taunton. Mass., W. P. Seaver. Worcester, Mass., S. Thompson. Boston, Jordon & Wiley. Newark, N. J., Robert Rashaw. Williamsburgh, J. C. Gander. TRAVELLING AGENTS. O. D. Davis, John Stoughton, John Murray, Sylvester Dierfenorf. CITY CARRIERS. Clark Selleck, Squire Selleck, Nathan Selleck. Persons residing in the city of Brooklyn, can have the paper left at their residences regularly, by sending their address to the office, 128 Fulton st., 2d. floor. =AMERICAN AND FOREIGN PATENT AGENCY.= No. 23 Chambers street, New York.