16 ANNUAL REPORT OF THE 
particularly to the results of an excursion to certain ranges in 
the deserts of Utah in 1904; and the peculiar features of the 
geographical cycle in an arid climate, with special regard to the 
work of Passarge on the Kalahari Desert. 
A week was given early in July to the cuidance of a party of 
students and professors forming an intercollegiate summer geo- 
logical course through the valleys of the Susquehanna and the 
Juniata in central Pennsylvania. On July 15 I sailed from New 
York to join the official party of the British Association on its 
excursion to South Africa, as a result of which my return to 
Cambridge will be delayed somewhat beyond the beginning of the 
next academic year. 
Publications. 
The Relations of the Earth Sciences in View of their Progress in the 
Nineteenth Century. Journ. Geol., Vol. 12, pp. 669-687. 1904. 
Glacial Erosion in the Sawatch Range, Colorado. Appalachia, Vol. 10, 
pp. 892-404. 1904. 
A Journey across Turkestan. Carnegie Institution, Washington, Pub- 
lication No. 26, pp. 21-119. 1905. 
The Opportunity for the Association of American Goneray kanes Bull. 
Amer. Geogr. Soc., 37, pp. 84-86. 1905. 
The Bearing of Physiography on Suess’s Theories. Amer. Journ. Sci., 
Vol. 19, pp. 265-273. 1905. iba: 
Tides in the Bay of Fundy. Nat. Geogr. Mag., Vol. 16, pp. 71- 
76. 1905. 
Leveling without Baseleveling. . Science, Vol. 21, pp. 825-828. 1906. 
By recent students : — | ; | 
D. W. Jounson. The Tertiary History of the Tennessee River. 
Journ. Geol., Vol. 13, pp. 194-231. 1905. 
W.S. Tower. The Development of Cut-off Meanders. Bull. Amer. 
Geogr. Soc., Vol. 86, pp. 589-599. 1904. 
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