NEW PUBLICATIONS. 235 



Haverhill. Copper and iron pyrites, blende, native arsenic and 

 arsenical pyrites, large crystals of garnet, and magnetic and white 

 iron pyrites. 



Franconia. Magnetic iron in veins running N. 30° E., 3 J to 4 

 feet wide, manganesian garnet, hornblende epidote, copper py- 

 rites Eaton. Vein of blend six feet wide, running N. 27° E., ga- 

 lena, containing silver in the proportion of one pound to one thou» 

 sand pounds j copper pyrites. Hillsborough. Graphite. 



Francestown. Soapstone. Dimbarton. Arsenic in a vein. Ran- 

 dolph. Andalusite made. 



Amherst. Pargasite, egeran and cinnamon stone, garnet in lime- 

 stone, amethyst, magnetic iron. Richmond. Soapstone, quartz, 

 I feldspar, phosphate of lime, pinite, rutile, pyrites, garnet, horn- 

 blende, anthophylite, iolite. 



Having stated some of the facts relating to the geology and 

 mineralogy of New-Hampshire, we pass to that part which treats 

 ;of agricultural geology and chemistry. We omit, purposely, a 

 inotice of the part which treats of metallurgy, at this time, in- 

 |tending to furnish our readers with some of the information upon 

 ithis subject, in a future number. Agricultural geology and che- 

 mistry is divided into five heads. Under the first. Dr. J. treats of 

 ithe mineral ingredients of soils, and of their distribution j under 

 the second, of the nature and origin of the organic matter of soils 

 ind the saline ingredients accompanying them ; under the third, 

 pf the substances found in plants ; under the fourth, of those ta- 

 cen up from the soils by the crops ; and fifthly, of the best me- 

 ihod of restoring fertility to exhausted soils. Under the first head, 

 't is maintained that soils originate from the rocks by disintegra- 

 ion and decay, and that the nature of the rock determines that of 

 ihe soil ; and as an illustration of this position. Dr. J. refers to the 

 oil of mica slate, as differing from a granitic soil ; the former 

 leing far more silicious, more highly charged with alkaline ingre- 

 jients, and as being warmer and more retentive of moisture. 

 ^he following is the composition of a fine mica slate, and granite 

 Dil: 



Mica Slate Soil. Granitic Soil. 



Water, 3.6 6.8 



Vegetable matter, 5.4 1.8 



Silica, 79.2 84.4 



