HOW CROPS GROW. 



Oil tlie Cheiical Composition, Strnctnre, M Life of tlie Plant, 



FOR ALL STUDENTS OF AGRICULTURE. 



WITH NUMEROUS ILLUSTRATIONS AND TABLES OP ANALYSES. 



BT 



SAMUEL, ^V. JOIIIVSOIV, M.A., 



PROFESSOR OP ANALYTICAL AND AGRICTTLTURAL CHEMISTRY IN YALE COLLEGE! ; 



CHEMIST TO THE CONNECTICUT STATE AGRICULTURAL SOCIETY ; 



MEMBER OP THE NATIONAL ACADEMY OP SCIENCES. 



Tliis is a volume of nearly 400 pages, in which Agricultural 

 Plants, or '* Crops," are considered from three distinct, yet closely 

 related, stand-points, as indicated by the descriptive title. 



THE CHEMICAL COMPOSITION OF THE PLiXT. 



Ut.The Volatile Part. 



2d. The Asli Its Ingredients ; their Distribution, Variation, and 

 Quantities. The Composition of the Ash of various Farm 

 Crops, with full Tables ; and the Functions of the Ash. 



3d. Composition of the Plant in various Stages of Growth, and the 

 Relations subsisting among the Ingredients. 



THE STRUCTURE OF THE PLANT AND THE OFFICES 

 OF ITS ORGANS. 



The Primary Elements of Organic Structure. 



The Vegetative Organs Root, Stem, and Leaf, and their Func- 

 tions ; and 



The Beproductine Organs, namely, Flowers and Fruit, and the 

 Vitality of Seeds with their Influence on the Plants they produce. 



THE LIFE OF THE PLiNT. 



Germination, and the conditions most favorable and unfavor- 

 able to it. 



The Food of tlie Plant when independent of the Seed. 



Sap and its Motions, etc., etc. 



The Appendix, which consists of twelve Tables exhibiting 

 the Composition of a great number of Plants viewed from many 

 different stand-points, will be found of inestimable value to practi 

 cal ajsrri'Milturists, students, and theorists. 



PENT POST-PAID. PRICE, $2. 



ORANGE JUDD & CO., 



245 Broadway, New-York. 



