38 



with irregular periods of eruption, throwing to a height of 

 one hundred feet 

 No. 17. The Uppeb Palls op THE Yellowstone, one-half mile above 



the Lower Falls, and photographed from a point nearly over 

 it, at a height ol* 500 feet above the river. Height, 140 feet. 

 (See No. 245, page 28.) 



No. 18. The Lower Falls of the Yellowstone, 397 feet in height; 

 width of river at the brink, 100 feet. Photographed from a 

 point one-fourth of a mile below the falls, and 300 feet above 

 the bottom of the canon. The perpendicular walls about the 

 falls form the upper end of the Grand Canon. (See No. 239, 

 page 28.) 



No. 19. Tiie Lower Falls of the Yellowstone. Distant view, from 

 the top of the canon, bringing in the brilliantly-colored and 

 castellated walls of the canon. (See No. 242, page 28.) 



No. 20. The Grand Canon of the Yellowstone, from a point direct- 

 ly over the Lower Falls and looking down. At this point the 

 canon has an average depth of about 1,600 feet, and of about 

 the same width at the surface. The view embraces nearly 

 one mile of its length. (See No. 248, page 20.) 



No. 21. The GRANS Canon, same as above, but the shape of the view is 

 oblong- instead of upright, embracing a very little wider 

 angle of view. 



No. 22. The Grand ('anon of the Y'ellowstone, from a point one mile 

 below the falls. The walls are much more abrupt and the 

 canon 600 feet deeper than the preceding. 



No. 23. Tower Falls, on Tower Creek, a small tributary of the Yellow- 

 stone, fifteen miles below the falls and about 600 yards above 

 the junction of the streams. They are 132 feet in height, 

 emerging from between great towers of closely cemented 

 breccia, that extend far up its canon toward its source in 

 Mount Washburn. (See No. 233, page 27.) 



No. 24, 23, 20. 27. The terraces and basins of the Mammoth Hot 

 Springs, on Gardiner's River. The first is a profile view 

 from below, the next two bird's-eye views from above, ami 

 the last a more extended view of one of the slopes. These 

 springs cover an area of about four square miles, on the right- 

 hand side of Gardiner's River, some three miles above its 

 junction with the Yellowstone. The temperature of the prin- 

 cipal springs varies from 120° to the boiling-point, and they 

 hold in solution a large amount of calcareous matter, which 

 has been deposited to a depth of many hundred feet. Upon 

 the slopes the deposit takes the form of beautifully scal- 

 loped basins tilled with water of varying temperature, 

 according to their remoteness from their source. The oxi- 

 dation of the mineral substances contained in the water has 

 stained the basins to every conceivable shade of red and 

 yellow, forming rich contrasts to the vivid greens and blues 

 of the waters. (See Nos. 215 to 225, page 20.) 



No. 28. The CAP OF LIBERTY, .Mammoth Hot Springs. A calcareous 

 mound, forty-five feet in height, from the apex Of which at one 

 time issued a hot spring, building up and growing higher, 

 until finally it closed itself up and died out, there not being 

 Sufficient force to impel the water to a greater height. (See 

 No. 227, page 27.) 



Nos. 29,30,31. The Lower Yellowstone Valley, a panoramic view 

 looking south from the First Cahon. On the left is the Yel- 



