FULLERS? EARTH. 
Tt has been found maffive only, fometimes conftituting 
~whole fletz-flrata. Large mafies, on being feparated, 
nerally difunite into joa pieces, whett expofed to the in- 
fluence of the atmofphere. 
Ree) 
o 
generall: often. it ‘appears perfectly co 
oidal, sad even ne ; be oak the fragments are in- 
ie ecenre tely angular and blunt-edged, and.in the latter cafe 
pureft varieties the edges are 
lefs. greafy, and {carcely. adheres. to the ee 
not a a Ac e ravity nig 
ee ne fullers’ earth does effe 
ac r are all os of it ‘oftant! ly reduced inte powder 
i that nid. mall pieces put into water almoft ‘in- 
ttantly crumble into conical heaps of minute, very foft par- 
ticles, without producing a crackling noife,as is the vai 
with bole; neither does a foaming take place, as has bee 
i ittedt, w ho cuaiutes this 
Though fufible per fe, it requires a high degree of heat : 
ny spl eg: in the 
, dark- “grey, opaq 
many grains . In the tee crucible the co was 
duced to a ea blackith, green , with foft, reddith, 
punGated fi xr. Bro art fays, that of Woburn 
melted into a flaggy-mafs at 120 ewood's pyro- 
meter. - a Made eae kind of ale an (according to 
the late Mr. W mann’s experiments, ) acquired before the 
aa ata a ea or fh black, ae Rae a i 
sments. 
the obfervation of the late Mr. Fichtel, that the true fuller 
earth “melts with great e eafe before the blow-pipe, ae 
with ebullition and. increafe of its bulk,’’ is undoubte a 
— in error. 
Ber 
earth. foe 
writers have follow 
s though, from the — defcription 4 
ves of its exter is ciently evident 
that = Alida on an Engl “fatlers? earth The refults 
ef his analyfis v 
i. - - 51.80. 
Alumine - - - 25.00 
ime + - 30 
Magnefi - - Bae 
_, Oxyd af rob - - a = 
a , Wa 5+50. 
The variety. lately analpzed bp Warmth; ‘which, j is aga ; 
‘afcertained t o be fro om ek gate, was found t © be com. . 
pofed of | 
‘Silica: = 53 
cies ine- = - 10 
Oxyd of iron - 9.75 
oe - - * 1.25 
Lim - = O&50 
Murat of foda  - o.10 
- 24 
. Kab ee ae only) 
98.60. Klap. Beitr. vol. iv. 
silat & it is more or lef dull ; hes fracture being aad : 
fine 8 per -. which colours, before the ee tee —- ie) toa canis 
rvefce. with nitrous: 
. collib 
- confounded with a kind of bole of th - 
- Weare ‘indebted to the fame eoapabiai chemilt os an 
analyfis of a Silefian fullers’ earth, the external chara¢ters of 
which agree pretty: well with thofe of ie other a 
except that its Colour is tile-red, like fome varieties of hole, 
either pure, or {po veined with white an green 
brown. ed parts of it co 
Silica + - - 48. ie 
- Alumine - - ~ 4 5: 50 
Magnelia -~ = 1.50 
Oxyd ofiran - 6.50 
eek of f Manganete - - 
Muriate of “foda, (a trace ate 
98 Klap. Beitr. vol. ive 
We mentioned above the Lemnian earth as a va of 
the common fullers’ earth; but it fhould be ae er ia 
three ae fubitances were comprized by the ancients 
under the name o a Lem . fays 
Galen, «6 fignantur differentia; una quam pofui terres 
» quam alii nemini, preter unam facerdotem, contingere 
fas eft 3 aliera vero iy que revera Milto elt five Rubrica: 
utuntur autem ea : demum ferfia ejus ex- 
ter ts ae utuntur i este et ne lavant; quibus utique 
eft.”’. The nature of the three kinds of earth 
altuded 3 in this beet i been placed in a clearer light 
by Klaproth. The /econd of them, ea Miltos, was a red 
eda eae for = purpofe of painting. The shird ap- 
pears to be the fame which is enna’ by Pliny ae the 
name of Cimolia, a an excellent fubftance for fulling : but 
it — nomagnefia. (See oo ) But the fir? cf 
the varieties enumerated by is the = terra figil- 
tes recommended as early as ae a me of Homer for - 
ood” cure of infeCtious difeafes, and {till celebrated in the e 
* for its imputed erga per 
At the t time of Dia 
corides = 7 mix 
marked w 
ar, oe 
rg 
ma ftrates, after fever 8 ceramonie 8, 
aped balls 
— bitin ; met a a bearing mie na 
Turkith language. This fubftan 
into w. air on 
— into a loofe heap, exaQly hike he common a flere 
arth, to which, notwithitanding the flight difference in the. 
refults a iat creas it may, according to Klaproth’s opi- 
nion, ered as fu ions a The genume Lemaian 
earth ae in hundred p 
uae - : 
Adum 
ak of fi iron 
rorait § ia 
Magieha - : 
Nat 
' 8 po 6 8 Fg 
nN 
oS ook R® 
nN 
wn 
Water ete ; 
Klap. Beitr. v0. jfag, 
The 
