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SCIENCE 



New Series. 

 Vol. IV. No. 102. 



Fkiday, December 11, 1896. 



Single Copies, 15 cts. 

 Annual Subscription, 85.00. 



Structural Geology. 



Many of the most prominent geologists and educators of the 

 United States have testified to tne u-ef illness in 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 aiticlinal 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 by Vassar College, Prof. Wm. 



The Topography op 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 



Ives Altitude Map. 



This is an original device by the same inventor and based 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 following, among other testi- 

 monials: 



B. Dwight writes : " It represents visually, and far more vividly 

 than words can do it, the crustal development of a large part of 

 the United Slates through the typical ages of geological history." 



It consists of a series often Superposed Maps, representing the 

 Geological Systems of the country, colored as recommended by 

 the International Congress of Geologists, portions being cut away 

 agreeably with the distribution of the several systems in nature. 

 The Cardboard Maps are hinged together to admit 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, handsomelj' half bound 

 in morocco, wiih gold Imes and lettering; or luounted under 

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

 form, is $17.50, and the size over frame is 30" x 24". 



The method of construction was invented, and the scientific 

 data have been most carefally compiled from government and 

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



Price, S17.50. 



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

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

 iiidicatmg elevations in relief is an impor ant 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: "I 

 consider your ' Strata and Altitude Maps,' which I have the pleas, 

 ure of examining with care, and of which I have purchased cop- 

 ies, excellent aids for class instruction. * * * Your plan is surely 

 an excellent one and the Maps will doubtless be appreciated by 

 all active teachers of geology. " 



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

 bian Exposition. It is beautifully gotten up, varnished and 

 framed in oak. Light and unbreakable. Size, 33"x23". 



Price. S9.50. 



ADDRESS ORDERS AND ENQUIRIES TO 



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



