W. A. Norton—Molecular and Cosmical Physics. 327 
and Deer Lodge Pass on the south, a distance of nearly 100 miles, 
covering all the passes of the main chain available for the 
Northern Pacific Road. He subsequently went down the Yel- 
lowstone, as mentioned before. 
9. At the same time, Gen. Thos. L. Rosser has made a sur- 
vey of a route between the Missouri at Fort Rice and the Yel- 
lowstone. 
3. Mr. Frank Wilkeson also made last. summer an examina- 
tion of the geology of the region between Cadotte’s Pass and 
eer Lodge Pass, with reference to the occurrence of coal 
and iron. 
4. Mr. Charles A. White has been across the Great Plain of 
the Columbia and through the Grand Coulée. 
lished)” four reports have been printed, but are not yet pub- 
ed. 
D. Mar or Transporration Routes in Mrynesora AND Dakota. 
partment of Dakota, and published on a scale of ten miles to 
one inch. The water courses, lakes, and routes of transit are 
carefully indicated, and the sites of settlements and villages; 
the heights of land are of course less accurately delineated. 
This vast region is now attracting so much attention and is so 
rapidly developing, that this preliminary map, prepared under 
circumstances of very considerable difficulty, 1s of special inter- 
est. The lakes which are so characteristic of Minnesota and 
Arr. XLIIL—On Molecular and Cosmical Physics; by Prof 
W. A. Norton 
A RECENT review of a portion of the ground theoretically 
Surveyed in my papers on Molecular and Cosmical Physics, 
published at intervals during the last eight years, has led to 
