HISTORY OF GEOLOGICAL SURVEY. 53 



him: In the early part of 1870, he traversed, on foot, the various moun- 

 tain notches between the Saco, Pemigewasset, and Connecticut rivers, for 

 the purpose of ascertaining their altitudes. Next he renewed the exami- 

 nation of the rocks of Coos county. Afterwards he joined our party in 

 the White Mountain explorations. Later in the season he continued the 

 exploration in Coos county and Bean's purchase. Later in the fall he 

 devoted himself to the interests of the Mt. Washington meteorological 

 expedition, attending to the completion of the arrangements for occupy- 

 ing the railroad depot as an observatory. The six months from the middle 

 of November to the middle of May were spent by him mostly upon the 

 summit, where he was the leader of the heroic party who risked their 

 lives in behalf of science. When this task was completed, he resumed 

 his work upon the geology of Coos county in 1871, being occupied until 

 late in July with the compilation of his report upon the geology of Co5s 

 county. He then took the field and labored in the northern part of the 

 state, also in Essex county, Vt., — the latter without cost to the survey, 

 though we receive the benefits of the exploration. In September he 

 examined the formations near Jackson, Bartlett, Conway, Albany, etc., 

 partly to carry on the search for labradorite rocks. 



Essentially the same field was traversed by him in the summer of 1872. 

 His researches in Albany will be found of special importance. In 1 873, 

 after the completion of the exploration in the northern part of the state, 

 he commenced working in the gneissic district lying between the main 

 range of porphyritic gneiss on the east, and the Connecticut valley Coos 

 group. The sketch of the geology of this tract will be written by him as 

 soon as possible. In the first volume, the chapter on meteorology has been 

 prepared by him ; also, topographical and scenographical contributions. 



Miscellaneous. 



Very much remains to be told of the history of our scientific ex- 

 plorations ; but we fancy it will be more satisfactory to read the com- 

 pleted results than to learn how they have been effected. In the reports 

 there has been a fine series of rock analyses by Profs. Seely and Blan- 

 pied; outHne sketches of the subject-matter of this series of volumes; 

 the progress of the microscopical department ; additional meteorological 



