AGRICULTURAL TEXT-BOOK. 295 



654. THE PLUM (Prunus domestic^) is a native of Eu 

 rope, with four indigenous species in the Northern United 

 States. Owing to the destruction of the fruit by the Curculio, 

 the culture of this tree has become insignificant. The principle 

 inorganic constituents are Potash, Soda, Lime, and Phosphoric 

 acid. (See Patent Office Report, 49, p. 480.) Many modes of 

 preventing the attacks of the Curculio have been proposed, but 

 none have proved entirely effectual. Dusting the tree with 

 slaked lime is, at present, looked upon with most favor. 



655. GRAPES ( Vitis ,) (a;) European grapes originally from 

 Persia. Quite distinct species from native American Grapes, 

 of which there are many species and varieties, (b,) European 

 grapes difficult to cultivate in America. Large vineyards on 

 the Ohio River, and other States south of that, (c,) Propa 

 gated by layers, cuttings, eyes, grafts, (d,) Cultivation 

 and pruning demand much skill and knowledge. Subject to a 

 mould on the fruit, curable by sulphur. 



656. Inorganic analysis of the leaves of the Catawba Grape, 

 picked, June 2d, nearly full grown (A,) and the same picked, 

 September 30, fruit abundant (B.) (Emmons.) 



A. B. 



Carbonie acid, - - 3050 8.900 

 Silicic acid, - - 29.650 Silica 23.150 



Sulphuric acid, - - 2062 1.426 



Phosphates, - 32950 28.750 



Lime, - 4.391 26258 



Magnesia, 1.740 5.330 



Potash, - 13.394 1.710 



Soda, - 9-698 2.983 

 Chlorine, 0.741 



Organic acids, - 2.250 3.450 



Chloride of sodium, - - 0.305 



From Grapes are made : 1. Grape Sugar. 2. Bitartrate of Potash, 

 (Crude tartar or Argol.) 3. Raisins, and small black &quot;currants&quot; im 

 ported from the Mediterranean. 4. Wine. 5. Brandy. 



657. GOOSEBERRY (Ribes Grossularia,) (a,) native of Great 



