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SCIENCE 



Friday, February 14, 1896. 



Single Copies, 15 cts. 

 Annual Subsceiption, S5.00 



Structural Geology. 



Many of the most prominent geologista and educators of the 

 United States have testified to the usefulness ia imparting the 

 facts and phenomena of this science of the 



Ives Strata Map, 



Which graphically exhibits superposition, denudation, and out- 

 crop of strata, with the phenomena of escarpments, outliers, 

 inliers, dip, strike, conformability, etc., while the cards may be 

 bent to show synclinal or anticlinal folds. 



A copy having been purchased for use in Johns Hopkins Uni- 

 versity. President D. C. Oilman wrote to the author : " Wherever 

 American geology is taught your map should be part of the ap- 

 paratus." 



Another having been purchased quite recently by Vassar Col- 



The Topography of the 

 United States 



Is impressively exhibited by a novel combination of the two 

 methods commonly employed, viz: The use of distinctive colors 

 to represent successive levels, and actual embossing, in the 



lege, Prof. Wm. B. Dwight, writes Jan. 1st, 1896: "It represents 

 visually, and far more vividly than words can do it, the cru.-tal 

 development of a large part of the United States through the typi- 

 cal ages of geological history." 



It consists of a series of ten Superposed Maps, representing the 

 Geological systems of the country, color d as recommended bv 

 the International Congress of Geologista, portions being cut away 

 agreeably with the distribution of the several systems in nature. 

 Toe Cardboard Maps are hinged together to a^lmit of examina- 

 tion in detail, while the Archean foundation and the superposed 

 strata are embossed so as to bring all to a plane surface. 



These Maps may be had in atlas form. Imndsomely half-bound 

 in morocco, with gold lines and lettering; or mounted under 

 glazed oak frame, as shown in illustration. The price, in either 

 form, is $17.50, and the size nver frame is 30" s 24". 



The method of construction was invented, and the scientific 

 data have been most carefully compiled from government and 

 other reliable sources of information, by James T. B. Ives, F.G.S. 



Price, S17.50. 



Ives Altitude Map. 



This is an original device by the same inventor and baaed like 

 the Strata Map upon data of undoubted authority. 



In reference to the usefulness of this map, as well as the Strata 

 Map, the author has received the followjng, among other testi- 

 monials : 



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Prof. E. D. Cope, of the University of Pennsylvania, writes 

 "Useful to the student, of topography and geology. The map 

 ind eating elevations in rehef is an important aid to the strati- 

 graphic map— both together elucidate the structure to the eye of 

 the student." 



President J. E. Talmage, of the University of Utah, writes Jan. 

 nth, 1896: "I consider your 'Strata and Altitude Maps,' which 

 I have had the pleasure of examining with care, and of which I 

 have purchased copies, excellent aids for class instruction. * * * 

 Your plan is surely an excellent one and the Maps will doubtless 

 be appreciated by all active teachers of geolosy. " 



Diploma and medal awarded for this also at the World's Colum- 

 bian Exposition. It is beautifully gotten up, varnished and 

 framed in oak. liigkt and unbreakable. Size, 33^' x23". 



_^^_ Price, S9-50- 



Further particulars and testimonials, if required, on application to 



JAMES T. B. IVES, Care of SCIENCE, 66 Fifth Avenue, NEW YORK CITY. 



