AMI 



ANA 



stimulating. "Wiien burned, the pow- 

 der becomes caustic. 



The lotion may be made with six to 

 eight drachms of alum to a quart of 

 water. It is used for grease, cracks 

 in the heels of horses, and ulcers 

 after the inflammation is subdued. 



The alum is used by dyers, but the 

 solution of acetate of alumina is su- 

 perior for most purposes. 



ALL'MINA. Pure base of clay, 

 argil. It is a scsquioxide of alumi- 

 nium, white, insoluble ; but it possess- 

 es a great affinity for water. In the 

 crystalline state it forms the sap- 

 phire and emerald. It is a feeble 

 base, uniting with acids. The hy- 

 drated silicate of alumina forms the 

 bulk of clav. 



ALUMIXIU.M. The metallic base 

 of alumina. 



ALVEOLATE. Covered with lit- 

 tle pits ; honey-combed. 



ALVINE. Relating to the bow- 

 els. 



AMALGAM. A compound of mer- 

 cury with a metal. 



AMANITA. A genus of poisonous 

 mushrooms. 



AMAUROSIS. Total blindness, 

 without loss of brilliancy in the eye. 



AMBLE. The same as the pace 

 in horsemanship. 



AMBUSTION. A scald or burn. 



AMELIORATING CROPS. Root 

 crops, clovers, and grasses, fed on 

 the land. 



AMENDMENTS. Sand, marl, and 

 other substances applied in 

 quantities to amend the tilth. 



AMENTUM. The catkin ; a de- 

 ciduous spike, such as that of wil- 

 lows, poplars, &c. Trees with this 

 inflorescence are called amentaceous, 

 and usually contain much potash in 

 their ashes. 



AMENTABOLIANS. Insects 

 which do not undergo metamorpho- 

 ses. 



AMERICAN BLIGHT. The wool- 

 ly or mealy aphis. Aphis lanigcra, 

 also called Eiwsoma mali : it is very 

 destructive to apple and pear trees in 

 England. See Insects. 



AMIDOGENE. A theoretical ba- 

 sis of ammonia, composed of N Hi : 



14 



large 



its compounds with metals are term- 

 ed amides, or amidides. 



A.MIDINE. The soluble, internal 

 portions of the starch globules. 



AM.MONIA. Volatile ahikli, spir- 

 its of liartshorn. See Nitrogen. 



AMMONIACAL GAS. The gas- 

 eous state of pure ammonia before it 

 is dissolved by water, in which it is 

 extremely soluble ; it is also rapidly 

 absorbed by charcoal, clays, rust, &,c. 



AMMONIUM. A hypothetic base 

 of ammonia, consisting of N H4. The 

 oxide of ammonium is the common 

 base, as found in the salts of ammo- 

 nia, and consists of N H4 0. 



AMNION. The delicate membrane 

 which surrounds the fetus in utero : 

 it contains the amniotic fluid, or li- 

 quor amnios. 



AMNIOS. The fluid within the 

 nucleus of the young seed, on which 

 the embryo feeds. 



AMORPHOUS. Without regular 

 figure or form. 



AMPHIBOLE. A variety of horn- 

 blende. 



AMPHITROPAL. In botany, an 

 embryo which is turned round in the 

 albumen, or curved upon itself in 

 such a manner that both its ends are 

 presented to the same point. 



AM PL EX I CAUL. Clasping or 

 embracing the stem. 



AMYGDALUS. The generic name 

 of the peach and almond. 



AMYGDALOID. Rocks in which 

 other minerals are imbedded, pudding- 

 stone. 



AMYGDALIN. A white, sweet- 

 ish, soluble matter in bitter almonds, 

 changeable into oil of bitter almonds 

 by the action of emulsin. 



AMYLACEOUS. Starchy, full of 

 starch. 



AMYLIN. Pure starch. 



ANAL GLANDS. Glands for the 

 secretion of various substances, sit- 

 uated near the anus. 



ANALYSIS Ihe separation of 

 the components of any substance. It 

 is guaniUatitc when the amount of 

 each ingredient is to be known, quali- 

 tative when the nature only. 



Analysis of soils is of no value un- 

 less rigorously performed with per- 



