American and Europe of Munn & Co., No. 37 Park Bow, New York. For a period ot nearly twenty-five years Mum Co. have occupied the position of leading Solicitors of American and European Patents, and during this extended experience of nearly a quarter of a century, they have examined not less than fifty thousand alleged new inventions, and have prosecuted upward of thirty thousand applications for patents, and, in addition to this, they have made at the Patent Office over twenty thousand Preliminary Examinations into the novelty of inventions,with a careful report on the same. This wide experience has not been confined to any single class of inventions but has embraced the whole range of classificationuch as Steam and Air Engines, Sewing Machines, Looms and Spinning Machinery, Textile Manufactures, Agriculture and Agricultural Implements, Builders' Hardware, Calorifics, Carriages, Chemical Processes, Civil Engineering, Brick Making, Compositions, Felting and Hat Making, Fine Arts, Fire-arms, Glass Manufacture, Grinding Mills, Harvesters, Household Furniture, Hydraulics and Pneumatics, Illumination, Leather Manufactures, Mechanical Engineering, Metallurgy, Metal Working, Navigation, Paper Making, Philosophical Instruments, Presses, Printing and Stationery,Kailroads and Cars, Sports, Games, and Toys, Stone Working, Surgical Apparatus, Wearing Apparel, Wood Working. ! Munn Co. deem it safe to say that nearly one-third of the whole number of applications made for patents during the past fifteen years has passed through their Agency. CONSULTATIONS AND OPINIONS FREE. ! Those who have made inventions and desire to consult with us are cor-l dially invited to do so. We shall be happy to see them in person, at our oflice, or to advise them by letter. In all cases they may expect from us 1 an honest opinion. Forsuch consultation, opinion, and advice, we make no I charge. A pen-and-ink sketch and a description of the invention should be I sent. Write plainly, do not use pencil or pale ink. I If a SPECIAL SEAKCH at the Patent Oflice is required, which embraces ; 1 a personal examination of all patented inventions and a report in writing, a j ' fee of $5 is charged. This examination is only advised in doubtful cases. j ' To Apply for a Patent, a model must be furnished, not over a foot ! in any dimension. Send model to Munn Co., 37 Park Kow, New York, by express, charges paid, also a description of the improvement, and remit ! $16 to cover first Government fee, revenue and postage stamps. j The model should be neatly made of any suitable materials, strongly fastened, without glue, and neatly painted. The name of the inventor should be , engraved or painted upon it. When the invention consists of an improvement upon some other machine, a full working model of the whole machine will not be necessary. But the model must be sufficiently perfect to show, with clearness, the nature and operation of the improvement. I IDesigns, Trade Marks, and Compositions can lie patented for a term of years; also new medicines or medical compounds, and useful mixtures of all kinds. When the invention consists ot a medicine or compound, or a new article of manufacture, or a new composition, samples of the article must be furnished, neatly put up. Also, send us a full statement of the ingredients, pro portions, mode of preparation, uses, and merits.