ON MANURES. 101 



Dr. Samuel L. Dana has now in press a work on these 

 subjects, designed expressly for farmers. He has hith- 

 erto most generously given to the public his valuable 

 discoveries without fee or rew?.rd, and it is to be hoped 

 that every farmer will show himself both grateful and 

 wise, by purchasing and studying this work, v/hich, from 

 the well known ability of the author, cannot fail to be 

 worth its weight in gold to all who will avail themselves 

 of its instructions. It is to be, I am informed, a volume 

 of about 175 pages, small octavo, divided into eight or 

 nine chapters, and these chapters into numbered para- 

 graphs. 



Chap. 1. On the Geology of Soil — showing that the 

 farmer need be neither a geologist nor mineralogist, as 

 agriculturally considered there is one rock and one soil. 



Chap. 2. 0/^ the Chemistry of Soil — In which just 

 enough is taught to show the farmer the nature and con- 

 stitution of rocks. 



Chap. 3. Properties and manner of action of the Ele- 

 ments of Soils — Very full on the action of salts. 



■ Chap. 4. Organic Elements of Soil — Containing a de- 

 tailed account of their origin and properties. 



Chap. 5. Geine — A full account of its properties. 



Chap. 6. Manures — The whole subject discussed. 



Ghap. 7, 8, 9. On the Artificial Preparation of Ma- 

 nures — the Principles of Irrigation — and the Physical Pro- 

 perties (f Soil — showing that these depend chiefly on 

 geine, &c. 



ANDREW NICHOLS. 



