Mr. Grimshaw numbers among his clients and references the Governments of the U. S., France and New South Wales, and some of the largest firms and corporations in the world--including the Standard Oil Co., the American Cotton Oil Co., R. Hoe & Co. (N. Y. C.), Silsby Mfg. Co. (Seneca Falls, N. Y.), Société des Forges et Chantiers de la Méditerranée (Paris, Marseilles and La Seyne), H. B. Rathbun & Sons (Deseronto, Ont.), The New York World, the Al. Foster Steamboat Co. (N. Y.), Nescochague Paper Co. (Phila.), Keasbey & Mattison (Phila.), Chalmers-Spence Co. (N. Y.), Crosby Steam Gage and Valve Co. (Boston), Hancock Inspirator Co. (Boston), Dixon Crucible Co. (Jersey City), J. A. Fay & Co. (Cincinnati), Asselin Frères (Paris and St. Denis, France), Hon. Edward Combes, C. M. G., M. L. C. (Sydney and Glanmire, New South Wales), and others. _CONSULTATIONS BY APPOINTMENT ONLY._ Address: 21 PARK ROW, NEW YORK. _BLACK PRINTS._ Inventors, Patentees, Engineers, Architects, Manufacturers, and others having Drawings of which they wish Reproductions made, will find my _Improved Black Prints_ (_Sharp Black Lines on Dead White Ground_) =FAR SUPERIOR TO EVEN THE BEST BLUE PRINTS.= This improved process of sun-printing from tracings is neat, clean, rapid, and sure, and as simple as blue-printing. Send for samples, and for prices of materials, or of prints made from your own tracings. Highest references and testimonials. FERNAND PONTRICHET, _Sole Proprietor_, =270 West 115th Street, NEW YORK=. WHY THE “Grimshaw Catechisms” ARE SO POPULAR. The _American Steam Engineer_ of New York, which is the official organ of the rapidly growing American Order of Steam Engineers, says in its issue of March 1, 1888: