

30 REPORT OF NATIONAL MUSEUM, 1889. 



most recent. This collection is now so far from complete that nothing 

 more need be said regarding* it here. 



There are, however, two smaller and less comprehensive collections 

 in this subdivision that should be mentioned. The first of these is a 

 series of some 250 specimens, in sizes about 5 inches square, repre- 

 senting the characteristic rocks of the various geological horizons of 

 New Hampshire, as described by State Geologist Hitchcock and Dr. 

 George W. Hawes, in Vol. in of the final reports on the Geology of 

 New Hampshire. This is accompanied by a proportional column pre- 

 pared by Prof. C. H. Hitchcock, and showing on a scale of 1 inch to 

 1,000 feet the relative thickness of the stratified rock formations of the 

 State. 



The second series is a valuable stratigraphical collection of Canadian 

 rocks as prepared by officers of the Canadian Survey for exhibition at 

 the Centennial Exposition in 1876. This comprises 854 specimens in 

 sizes about 3 by 4 by 1 inch. 



The following is a complete list of the models or relief maps now on 

 exhibition, many of which have already been referred to : 



(1) Yellowstone National Park. Scale, 1 inch = 1 mile ; horizontal 

 and vertical the same. Modeled by E. E. Howell. Issued by Ward 

 and Howell. Size, 4 feet 7£ inches by 5 feet 5£ inches. 



(2) Elk Mountains of Colorado. Scale: Horizontal, 1 inch = 1 mile ; 

 vertical, 1 inch = 2,640 feet. Modeled by W. H. Holmes. Size, 2 feet 

 2 inches by 3 feet 8 inches. United States Geological Survey. 



(3) Mount Vesuvius and Monte Sorama, Italy. Compiled by Thomas 

 Dickert. Size, 2 feet 4£ inches by 2 feet 4£ inches. Issued by Ward 

 and Howell. 



(4) Geological model of Switzerland. Size, 11 by 24 inches. 



(5) The Washoe District, Nevada. Scale, 1 inch = 1,666 feet or 

 1:20000; horizontal and vertical the same. Geology by G. F. Becker, 

 U. S. Geological Survey. Modeled by E. E. Howell. Size 2 feet 5£ 

 inches by- 3 feet 3 inches. Issued by Ward and Howell. 



(6) Leadville, Colorado, and vicinity. Scale, 1 inch = 800 feet, or 

 1 : 0600. Geology by S. F. Emmons, U. S. Geological Survey. Modeled 

 by E. E. Howell. Size 2 feet 7£ inches. Issued by Ward and Howell. 



(7) The same in sections. U. S. Geological Survey. 



(8) Gulf of Mexico. Scale, vertical, 1 inch = 1,000 fathoms ; ratio 

 of vertical to horizontal, 0.03. Size, 23 by 32 inches. Issued by Coast 

 and Geodetic Survey. 



(9) The Yosemite Valley, California. Scale, about 4 inches to 1 

 mile. Horizontal and vertical the same. Modeled by E. E. Howell 

 from surveys by King and Gardner. Size, 2 feet 5 inches by 4 feet £ 

 inch. Issued by Ward and Howell. 



(10) The San Juan Mountains and mining regions. Scale, 1 inch = 

 1 mile, or 1 : 63360 ; vertical scale three times the horizontal. Modeled 

 by T. W. Eglostein. Size 4| by 3i iuches. U. S. Geological Survey, 

 Capt. George M. Wheeler in charge. 



