82 
Psyche 
[April 
south-east 98, northeast-south-west 89. An evident cause for 
the diminished height was the crushed in state of the top of the 
dome which was flattened and marked as if by human footprints 
partly filled in by the ant’s work. No actual break into the in- 
terior remained. A large human footprint on the north-east 
slope near the top indicated disturbance with the normal surface. 
The entire mound was frozen stiff, smooth on the surface with 
some of the small tufts of grass still green about the lower parts 
of the slopes. 
July 20, 1924, after several days clear and dry, in a very 
rainy season, the ants were very active over the surface of the 
mound at four to five p. m. Mound in a fine state of repair with 
four holes near the top on the north and one at the summit 
nearly, from which ants emerged ; other holes concealed by talus 
except on the base of the north where talus was absent and old 
holes of egress show plainly, so that the north side seemed inac- 
tive and dead in comparison with the very long talus of fresh 
mouthfuls running far down to the south-east. Grass about 
eight inches high but not very flourishing made a ring about the 
bare summit. The moat or bare space about the base of the 
mound was very conspicuous from dead defoliated honeysuckle 
and stone or gravel made clean by the ants having removed the 
earth. Two dead branches projected from south-east part of 
east side near the base. Measurements as made with the aid of 
a level and angle, tape and yard-stick were: height, west 19/4 
inches, east 33 inches, diameter east-west 88 inches, north-south 
85 inches, north-west-south-east 96 inches, width of moat: 
north 12, west 19, south 16, east 14, circumference at base: 22 
ft. 6 in., circumference of moat 29 ft. 8 in. Angle of slope: 
north 35°, but at base 45° where dead and full of holes; south- 
east 28°, west 35°, east 35°. Distance by tape up west side: 3 
ft. 4 in., up north 3 ft. 4 in., up east 4 ft. 4 in., up south-east 5 
ft. 11 in. 
The final measurements made at the end of the year 1924, 
December 20, showed the mound as it then appeared at the 
height of its recovered maximum, after the previous period of 
depression but they are not added to the following table since 
