METALLA. MagnaHa. 49} 
tngulofas aut reBasfecedens, forma fape communi , in- 
terdum prifmatum kexaedrorum comprejf orum pyramide 
tetraedra terminatorum , rarius tabularum tetracdrarum 
redangularum, falis communis fpiriiu pro magna parte 
folvendum , eique colorem concilians. 
^9' Magnesia^ FragiUs, macra, opaca, fufca, in- 
^ tus cana , ferro difficilius igne 
liqnefcens , ponderis fpecifici 
— 6850 ; 1000. 
Acidis plurimis folvenda,&affufo 
fanguinis lixivio colore ochro- 
leuco ex his praecipitata.' 
Calce pro majore minorive phlo- 
gilli fuperftitis portione nunc 
hoc nunc illo colore confpicua, 
minima portione vitris addita 
haec omni tindlu orbante, paulo 
majori violaceum, adhuc majore 
nigrum colorem afFricante, 
**gulina. I. M. inquinans nitoris Intus metallici textura: divergenti- 
radiatx. Lapeiroufe aci. ac. Tolof, i.p. 256. 
H abitat in ferri fodinis Sem vallis pyrecaca: Vic-daffbs , 
reniformis f magneti non obtemperans , fubmalleabUis / 
an nomine reguli magnefiee revera digna ? 
'*^hracea, 2. M. friabilis inconfpicua terrea. 
Syfl. nat. XII. 3. p, 194..». 9. Ochra magnefia: pulverea 
nigra. 
Crot^. miner. II4. Magnefia friabilis terriformis. 
Habitat in Anglia , Pyrcnsis (prope Sem & Lapeiroufe , ) 
Ftanconiae/edtWs CulmbacenCbus & Sibiria? montibus 
altaicis utplurimum nigra , rarius fuperficialis rubra, an 
tx fatifcentibus fpeciehus durioribus nata ? 
f'^oruin, 3. M. nigra friabilis natans ,'Cccata , obiter contufa &: eunt 
oleo ungainofo fubafta ad aerem^liberutn fponte exar-* 
defeens, 
T4 
