232 QUARTERLY JOURNAL 



NEW PUBLICATIONS. 



Geological and Agricultural Report of New -Hampshire, by C. T. Jackson, M. D. 



This report, which is published by order of the Legislature, is 

 in one quarto volume of 375 pp. It is very well printed on good 

 paper, and is illustrated by maps and diagrams. Dr. Jackson has i 

 executed his work with ability, and the Report itself shows upon 

 its pages that he is a thorough field-geologist, and can master all I 

 the intricate local questions in this department, as well as those i 

 general problems of geological dynamics, which are often so diffi- 

 cult and perplexing. We should not, however, do justice to thc' 

 author of this work, if we failed to state, that we consider the< 

 Report as eminently practical ; and is, especially on this account, 

 of great value to the farmers of New England, or wherever it 

 may circulate. We therefore propose to give a pretty full analy- 



sis of the work, that our readers who are not able to procure it, 

 may be put in possession of some of the important results of this 

 survey — especially the agricultural part of it — a part in which 

 they will probably feel the most interest. * 



The rocks of New-Hampshire, as it appears from this report, be- 

 long almost entirely to the primary class ; or to that class which 

 is destitute of organized bodies. So far as Dr. Jackson's inves- 

 tigations go, petrifications are not found in any rock, except in the 

 tertiary class, which occasionally appear on, or near the coast. 

 The argillaceous slate, a rock of sedimentary origin, and resting 

 upon gneiss and mica slate, is found in Hinsdale, Winchester, Ches- 

 terfield, and a few other towns. On the Vermont side, it furnishes 

 roofing-slate, which, though not so smooth and fissile as those ol 

 Maine and New York, yet, are very strong and durable. Still 

 higher in the series is a conglomerate, the new red sand-stone, of an 

 era just posterior to the coal-formation ; it however only bor- 

 ders the slate, without crossing the line. It is found in North- 

 field, Mass., near the south-western corner of the State. Wt 

 have no more to say, at this time, of sedimentary rocks. 



From these few facts, it will at once appear, that the great in 

 terest in the geology of New Hampshire, lies in the valuable 

 minerals associated with primary rocks. Of those minerals, Dr 



