96 
EARTHS. CALCAREOUS. 2t. Humus. 
21. HUMUS. Confiding of carbonate of lime, a 
fmaller proportion of filica, hydrogen and car- 
bonic acid gas, and oxyde of iron : formed by 
the decayed remains of animal and vegetable 
fubftances : light, friable, imbibing but not re- 
taining water, meagre, rough, humid, of a dull 
colour: effervefeing with nitric acidj becoming 
cinereous in a fmaller heat, in a ftronger running 
into a frothy kind of glafs. Mould. 
ammalis. Impalpable^ greedily imbibing water, hardly effervefeing 
with nitric acid in its rude Hate, but fenlibly fo when 
burnt. 
Humus animalis. Sy/f. nat, xii. 3^ f. 2iz, n. 14. 
Humus auiinalis. Wall.Jyft.m'm. 1. p 23. n. 8. a. 
Humus diverforum anim. Crond. min. feS. 246. 
Found in Churchyards and other places abounding with putrid 
animal matjer, white or cinereous, very light and fertile. 
dadaka. Brovvnj in a very fubtile duft. 
Humus vegetabilis. Syjl. nat. xii. 3. p. 209. n. 1. 
Found in all inhabited places, principally originating front 
animal raanvre and depofitions, lo very fine as when mixed 
with water to pafs through a coarfe cloth or filtering paper', 
it affords the bell and richeft garden mould. 
.y«ra/(V. Black when moiltened, ciriereons when dry. 
Humus vegetabilis. &yst. xii. 3. p. 209. n. 2. 
Humus atra Wall, fpfl min. l. />. 13. «. 1. 
Found in all places where there is decayed vegetable blatter 
elpecially in dry fituations, and produces an -excellent foil. 
fauperata. Soon parting with its moifture, and when dry becoming 
farinaceous. ' 
Humus vegetabilis. Syjl nat. xii. 3. p. 209. «. 3. 
Found on Heaths, and produces a poor loil; becaufe its parti- 
cles are fo minute and impalpable, as in dry feafons to be 
blown about by the leaft breath of wind. 
^Ipina, Brown, with larger particles, 
Hum. vegetab. grolf. S'/ti. nat. xii. 3. p. 210. n- 5. 
Very common in Alpine fituations, 
ejer-vetuns Swelling after having abforbed and retained water fom« 
lime. 
Hum. vegetab. acerof, Sj?/?. nat, xii. 3, p. 210. n, 4, 
