HISTORY OF GEOLOGICAL SURVEY. 



Agricultural Geology and Chemistry, 39 pages. 



Appendix to Geology 4 pages. 



Barometrical Tables 35 pages. 



Appendix to Agricultural Geology and Chemistry, 45 pages. 



Glossary, Index, and Errata, 11 pages. 



In the first annual report is described the method of proceeding v/ith 

 the explorations. Knowing that the strata pursue a general north-east 

 course, Dr. Jackson proposed to cross them several times at right angles, 

 and also along their line of strike, or a north-east course. These lines of 

 explorations would divide the territory into triangular areas whose boun- 

 daries would be known, and various excursions across them would make 

 the knowledge of each tract more or less accurate. The cross sections 

 described are from Portsmouth to Claremont through Concord ; from Con- 

 cord to Wakefield ; from Wakefield to Haverhill, — all measured by Messrs. 

 Whitney and Williams. Dr. Jackson measured another, from Concord to 

 Winchester, traversing outside of the line the towns of Amherst, Peter- 

 borough, Dublin, Keene, and Brattleborough. Messrs. Whitney and 

 Williams also travelled to the northern corner of the state as far as 

 Mt. Carmel ; and this section is connected with a longitudinal section 

 along Connecticut river, measured by Dr. Jackson from Haverhill to 

 Northfield, Mass. The field work closed after a tour to the White Moun- 

 tains, including Jackson, Eaton, and Mt. Gunstock. 



The pamphlet report of the first year's work contains remarks upon 

 economical geology and agriculture, but does not exhibit any illustrations 

 of the sections. Those were reserved for the quarto volume, and consist 

 of the ones enumerated as measured by Whitney and Williams, and the 

 longitudinal one along Connecticut river as far as Mt. Carmel (Camel's 

 Rump). The former are much superior in artistic execution to the latter. 

 Excepting one theoretical section and the geological map, the material 

 for the plates seems to have been entirely obtained from the results of 

 this year's explorations. 



Second Year's Work. The second year's explorations commenced at 

 Nashua. A party of assistants explored the southern range of towns 

 between Nashua and Connecticut river ; but they do not seem to have 



