1876.] Ancient Ruins in Southwestern Colorado. 31 
sity, Indianapolis, Indiana, gave some instruction in ichthyology. 
Near the close of the work, in the latter part of August, several 
parties were organized to afford the students the opportunity of 
making extended journeys in the direction of their homes. One 
or these parties made a journey of two weeks and another of four 
weeks through the mountains of eastern Kentucky and Virginia. 
Professor Kerr accompanied a party through a part of the mount- 
ains of North Carolina. 
The instruction of the camp began July 1st and closed August 
30th. It is proposed to hold the next session of the school at or 
near the same point, in 1876. The number of students admit- 
ted will probably be increased to fifty, and the other conditions 
will remain the same. The eminent success of the experiment 
was in the main due to the coöperation of the Kentucky Geolog- 
ical Survey. This survey furnished six skilled persons, who had 
been trained in the study of the rocks of the State, to the list of 
teachers. It is satisfactory to note that this assistance was given 
without any detriment to the researches of the survey, it being 
found that the students were a help rather than a hindrance to 
the work of the assistants. 
It should be noted that the class was limited to persons who 
Were graduates, or who were actually engaged in teaching or in 
fitting themselves for the work of professional geologists. 
— 
ANCIENT RUINS IN SOUTHWESTERN COLORADO. 
ME W.-H. JACKSON, the photographer to Professor Hay- 
den’s United States Geological Survey of the Territories, 
describes and figures in the Bulletin (second series, No. 1) of the 
Survey certain ancient ruins of Indian structures discovered in 
the valleys and gorges of the extreme southern corner of Colorado 
Territory. o 
One of the most perfect houses seen was discovered in the 
‘crevices of the escarpment of the Mancos Cañon, eight hundred 
feet vertically above the stream at its bottom. This house (Plate 
I., Fig. 12; this and plates I. and II. were kindly loaned by 
Professor Hayden) is two storied, and remarkable, not only on 
account of its elevated and almost inaccessible position, but from 
the pains with which it was built, the walls having been con- 
structed of carefully dressed stone, plastered within and painted 
m two colors. 
