THE 33EST 







This Illustrated "Weekly Journal of Practical Information on Art, Science, Mechanics, Invention, 

 Chemistry and Manufactures, has been published Twenty Seven Years, aud stands at the head of 

 Industrial Journals of the world in point of Circulation and Influence. 



Every number has Sixteen Imperial pages, embellished with Engravings of New Inventions , Machin- 

 ery, Tools for the Workshop, House, and Farm, also Public Buildings, Dwelling Ilouses, aud Engineer- 

 ing Works. 



The Scientific American is the same size as ITarpers' Weekly and full of Engravings. 



The Illustrated Department of the Scientific American is a very striking feature, and has elicited 

 the praise of the Press at home and abroad, and all articled appearing in its columns are written in a 

 popular and instructive style. 



To Inventors and Mechanics the Scientific American has special value and interest, from the fact 

 that it furnishes an Official List of Patents issued, with copious notes of the principal American and 

 European Patents. 



The Publishers offer as a Premium for Clubs the largo and splendid Steel Engraving " American 

 Inventors," a3 follows : Any one sending ten subscribers for one year and 25 will receive a picture. A 

 Club may be made up from different post-offices. 



For lull particulars and sample copies of the Scientific American, address the Publishers. 



The receipt for tempering Steel and all articles pertaining to the Work-Shop and Mechanic's Tools, 

 ind articles ia use in all households, are published iu its columns and worth ten times the subscription 

 price of the paper. 



Terms to the Scientific American : Single copies one year, $3.00: sis months, $1.50: and one 

 dollar for four months. To Clubs of ten and upwards, $2,50 each per annum. Address, 



< MTJNN & CO., 37 Park Bow, N. Y. 



GREAT* VALUE OF PATENTS. 



g*v ROB ABLY no investment of a small sum of money brings a greater return than the expense 

 5jM incurred in obtaining a patent even when the invention is but a small one. Larger inventions 

 yfi'M are found to pay correspondingly well. The names of Blanchard, Morse, Bigelow, Colt, Er. 

 ^y' ricsson, Howe, McCormick, Hoe, and others, who have amassed immense fortunes from their 

 \jyfyd inventions, are well known. And there are thousands of others who have realized large sums 

 from their patents. The first thing requisite for an inventor is to know if his invention is pat- 

 entable. To obtain this information, prepare a sketch and description of the invention, or 

 send a model to Menn & Co. and ask advice. ,. 



TTOW TO tJ!7% & > More than Fiftt Thousand inventors have availed 



uv " siefcP lW Jr7~~ themselves of the services of Mcnn & Co. during 



HUT A TNT iwffinpJW/ttfftl^ the TWENTY-SIX years they have acted as solici- 

 \)D JXLvii\^ &%/VS/9<%Q^^ tors and Publishers of the Scientific American. 

 They stand at the head in this class of business, and with their large corps of assistants, mostly selected 

 from the ranks of the Patent Office ; men capable of rendering the best service to the inventor, 

 from the experience practically obtained while examiners in the Patent Office, enables Mcnn & Co. to 

 do everything appertaining to patents quicker, better and cheaper than any oiher reliable agency. 

 Mcnn 6i Co, examine drawings, models and descriptions of new inventions cf every kind, and give 

 opinion asto their patentability, by mail, freeof charge. They also make special examinations at tha 

 Patent Office, and furnish a more elaborate opinion for a fee of $5.00. 



Mcnn <fc Co. prepare specifications and drawings for Patents, Caveats, Re-issuee, Designs, Trade- 

 Marks, Copyrights, Assignments, conduct Interferences, obtain Extensions, and solicit Patents in all 

 foreign countries. Every patent taken by Munn & Co. receives special notice in the Scientific Ameri- 

 can, which is read by 200,000 persons. A pamphlet giving prices of Foreign Patents and lull particulars 

 8ent free. 



CANADA. Patents maybe taken in Canada by Americans on the same terms as by their 

 own Citizens new law just passed copy of law and full particulars sent free. 



HINTS TO INVENTORS. - A book of 110 pages, with 140 engravings of mechanical move- 

 ments, containing the U. 8. Patent Law's, Government fees, rules and proceedings, how to make applica- 

 tions for Mechanical and Chemical Patents, Caveats, Re-iesues, Designs, Trade-Marks, and Copyrights, 

 hintson selling patents, etc., free. A bound volumo with addition of the new census, by counties and 

 principal cities, important to every seller of patents, price 20 cents. Advice, free. Everything coniiden- 

 ent 1 " 1 . Address all communications to 



MUNN & CO., Publishers Scientific) American, 

 Qjp.ce in Washington, cor. F & 7th SU. 37 Park Row, New YoriS, 



