GLOSSARY. 307 



Hooked, harrowed. 



Hornblende, one of the most abundant species of rocks. It is of a 

 black or dark green color ; is heavier than flint or felspar, but not 

 so hard ; yields a bitter smell, when breathed upon, and easily 

 melts into a black glass. It sometimes forms entire mountains, or 

 slaty beds in mountains. 



HorticulUire is to the garden, what agriculture is to the farm, — the 

 application of labor and science to a limited spot, for convenience, 

 for profit, or for ornament, — though implying a higher state of culti- 

 vation, than is common in agriculture. It includes the cultivation of 

 culinary vegetables and of fruits, and forcing or exotic gardening, as 

 far as respects useful products. 



Hove, or Hove?!, raised, swelled, tumefied. A disease of cattle, same 

 as blown. 



Humus, or Gcine, the product of organic matter, and the food of 

 plants. 



Hurdling, enclosing a portion of a field with hurdles, in which sheep 

 are confined, and, as the crop is consumed, changing the pen to a 

 fresh place, till the whole is eaten oft'. 



Husbandman, one who farms generally ; that is, who produces both 

 grain and cattle, and attends to the dairy, the poultry, and the or- 

 chard. A farmer, says Loudon, may confine himself to grazing, or 

 to breeding, or to haymaking, or milking, or raising green crops for 

 the market, &c. , but in none of these cases can he, with propriety, 

 be called a husbandman. The term farmer is, therefore, not exact- 

 ly synonymous with husbandman. 



Husbandry is here used as comprehending all that belongs to agricul- 

 ture. 



Hydrates, those substances which have formed so intimate a union 

 with water as to solidify it, and render it one of their component 

 parts ; solid compounds with water. 



Hydrate of lime, a solid compound of lime with water. 



Hydrogen, a very light, inflammable gas, of which water is in part 

 composed. It is used to inflate balloons. 



Hydrometer, see Areometer. 



Hypotenuse, the longest side of a right-angled-triangle. If an oblique 

 line be drawn from one corner to another, of a square, dividing it 

 into two triangles, this drawn line will be the hypotenuse of each 

 triangle. 



Impalpable, much comminuted ; very fine ; not to be perceived bj 

 touch. 



Incineration, the converting of vegetables to ashes, by burning. 



Incumbent, resting or lying upon. 



Inorganic Matter, devoid of organization ; not formed with the organs 

 or instruments of life ; pure earths. 



Insoluble Matters, matters which cannot be dissolved by the waters 

 of the soil. 



Irrigation, conducting water to the surface of grass lands, or apply- 

 ing water, in any way, on the surface. 



Isosceles, that which has only two sides equal. 



Jiurnaly an English measure, of two thirds of an acre. 



