77 
/‘irinacea- 
scriptoria. 
^aml. 
^*sninunis^ 
EARTHS. CALCAREOUS, ii. Tophus. 
Farinaceous, loofely cohering, floating, foiling the fin- 
Calx folubilis purpurea. SjH. not. xii. 3. p.zoS. n, 2. 
Agaric mineral, var. i. Kirriuen miner. 1. p. 76. 
Soft Carboiiat of lime. var. i. 3.^. 608. 
Found in Britain and various parts, in the clefts of rocks, or the 
bottom of lakes, or caltareou- mountains; it is formed of 
more compadl particles, is exceedingly brittle and reducible 
to dull, does riot adhere to the tongue : colour white, reddii'h, 
or yellowifh. 
Splid, rough, (lightly adhering to the tongue, without luf- 
tre, opake, flaining the fingers, breaking into inde- 
terminate fragments. 
Calx creta. Syji nut. xii. 3. p. 206. «. 1. 
Cba.k. Kirnvan 1 p.pj. Hchmeifter. 1.71,214. 
Soft Carbonat of lime. var. 2. Thomfon them. 3. p. 608. 
Common chalk. SowerLy Brit . miner . tab 7. 
Found in large ftrata in various parts of Britain, Germany, 
Franee, and .','weden, particularly on fome fea coalls, often 
containing flints and the veftiges of echini and (hells: colour 
generally white, rarely greyilh : feels rather rough to the 
touch, and tfFervefees llrongly with acids: contains carbo- 
nate of lime 95. alumina 2. water 3. 
Solid, hardifh, biittlc, a little (hining and tranfparent, 
Arenaceous limeftone. Kirnvan miner. 1 . /i. 78. 
Found on the (hores of Rhaghery, a fmail ifland on the coatt of 
.Antrim, and at CodriUa, on the well fide of Fe/tevius, yellow. 
i(h-white. In the lump it cannot be eafily broken, but in 
(mall pieces it fritters between the fingers: phofphorefce* 
when feraped in the dark with a knife: fpecific gravity 
2,742. contains carbonic acid 47. AT/Waa. 
II. TOPHUS. Confining principally of carbonate 
of litne : precipitated by water under water: po^ 
rous, without luftre. 
Depofited at the bottom of cold waters running through 
mountains and calcareous ftrata. 
SyjLnat. l. p 191. xii. 3./). 183. «. 3. 
Stalaffites calcarcus. PFail./yft. min. 2. p. 389. n. 10 f 
Stalaft. figura incerta. Cronjl. miner, fefi, 12. i. c. 
Found in every part of the globe, fometimes hardening in the 
air, fometimes mouldering, of numerous varieties with re- 
fpeft to colour, and often forming the flrlt material of calca- 
reous ftrata. 
