ANG 



ANN 



ses in the other branch to C ; and 

 the diflerence at C, of the levels at 

 which it stands in the two branch- 

 es, is the hcifjjht of a cohinin of wa- 

 ter, the weigiit of whicii forms a 

 counterpoise to the force of tlie wind. 

 Tlic rehUive velocities of the wind 

 are thus ascertained, the variation of 

 the velocity being nearly proportion- 

 al to the square root of the resist- 

 ance. The bore of the tube is di- 

 minished at the bottom to check the 

 undulations of the water caused by a 

 sudden gust of wind. Various other 

 contrivances have been proposed, of 

 which one of the simplest is to ex- 

 pose a flat board of given dimensions 

 to a current of wind, and observe to 

 what extent it will force back a spring 

 attached to it, and resting against an 

 immoveable obstacle. — (Brande.) 



ANEMOSCOPE. An instrument 

 showing the direction of the wind ; a 

 weathercock. 



ANEURISM. In farriery, a throb- 

 bing tumour, produced by the dilata- 

 tion of the coats of an artery in some 

 part of the body of an animal Aneu- 

 risms in the limbs may be cured by 

 making an incision, exposing the ar- 

 tery, and tying it above and below 

 the tumour with a proper ligature. 



ANGINA. In farriery, a name 

 sometimes applied to the quinsy, or 

 what in animals is termed anticor ; 

 sore throat. 



ANGIOSPERMOUS. Having the 

 seeds enclosed within a covering or 

 pericarp. 



ANGLE BERRY. In farriery, a 

 sort of flesby excrescence, to which 

 cattle and some other animals are 

 subject under difierent circumstan- 

 ces, and are supposed to proceed 

 from a rupture of t!ie cutaneous ves- 

 sels, which give vent to a matter ca- 

 pable of forming a sarcoma, or fleshy 

 excrescence. They frequently ap- 

 pear upon the belly and adjacent 

 parts, hanging down in a pendulous 

 maimer. 



AN GUST ATE. Narrow, dimin- 

 ishing rapidlv in breadth. 



ANGUSTURA BARK. The bark 

 of the Cusparia fchrifuga of South 

 America ; used as a tonic. 



24 



ANHYDRITE. Anhydrous gyp- 

 sum. 



ANHYDROUS. Without water ; 

 a chemical term to express the en- 

 tire absence of water in a salt or acid 

 substano^. 



ANI>^\.L. Any object capable of 

 voluntary motion ; a function de- 

 pendant on the nervous system, 

 which is peculiar to animals and ab- 

 sent in plants. 



ANIMAL ACIDS. Acids existing 

 in animals, or produced from their 

 tissues. The principal are the oily 

 acids, choleic, lactic, and uric, which 

 see. 



ANIMALCULES. Infusorials. 



ANIMAL MANURES. See Urine, 

 Manure. 



ANIMAL POISONS. The bites 

 of venomous reptiles, rabid dogs, the 

 contagious diseases produced by de- 

 caying meat, cheese, infected cattle, 

 glanders, are all called animal poi- 

 sons. They usually produce great 

 prostration, and call for the use of 

 ammonia and stimulants. 



ANIONS, See Electrode. 



ANISE SEED. PimphieUaanisym. 

 The aromatic seeds of a well-known 

 umbelliferous plant. The oil is a 

 grateful aromatic to the stomach. 



ANTSOTOMID.E. A family of co- 

 leopterous insects, having monili- 

 forni or beaded antennae, sub-elon- 

 gate, slender at the base, gradually 

 increasing towards the apex, with a 

 terminal club-shaped multiarticulate 

 joint ; palpi various, generally fili- 

 form ; head small and ovate ; body 

 convex, never linear. 



ANKER. A small wine barrel of 

 10 gallons, or 8.v imperial measure. 



ANNOTTA,ARNOTTA. Roucon. 

 A red dye, obtained by fermenting the 

 pulp of the seeds of the Bixa orcllana, 

 a tree of the West Indies. In the 

 dairy a colouring matter is used un- 

 der this name, which is manufactured 

 from madder or carrots. 



ANNUALS. Plants which perfect 

 seeds in one year and die, as wheat, 

 rye, &c. 



ANNULUS. An organ resembling 

 a ring, as the collar which surrounds 

 the stem of some mushrooms. 



