206 English Prefixes derived from the Greek. 
As obtained, Should be, 
18-46 C : 18-46 Mg : 17-47 & | 18-46C : 18-46 Mg: 18-46H 
21-996 ; 14-09 Mg ; 29-64 | 21-996 : 14-66 Mg : 29:32 H. 
The compound (Mg)? C+2H was obtained from sulphate of 
magnesia by co/d precipitation, by means of carbonate of potash 
with an excess of sulphate of magnesia ; the compound Mg+C* 
+88, by the evaporation of a concentrated solution of carbon- 
ate of magnesia in water impregnated _ carbonic acid at a 
temperature approaching reezing poin 
The principal inference deduced ae is as follows. 
All the hydrated aaalieain aadeteel hitherto arialyzed, when 
made amenable to polymeric isomorphism, may be ranged in ew 
. Semi-carbonate of hydro-magnesia ; and 2. 
fold hydrated three fourths” carbonate of (hydro-?) pa Pte 
The salts of the first group; generally speaking, are ‘obtained - 
precipitation cold, and those of thé second group by precipitation 
at an elevated temperature. ip certain exceptional circumstances, 
in connection especially with a depression of temperature, the 
compounds of the firs anare: are enabled to take up two atoms 
more, and those of the second group four more atoms (eight there- 
fore in all) of water of Lamy ization. 
Ant. XVILI.—English eek = be oe the Greek; by vanes 
— 
e pr refixes, it should be observed, 2, ante sometimes employed 
as «prepositions with their complemefits, are originally and properly 
ve 
1, Amphi or amphis, Gr. Po or. eg ol. nb —Sanse. api, 
Lat. ambi,‘amb, am, dn, Old Germ. umpi, Germ. um, Anglo-Sax. ymbe, 
ym, onto emb 5 (connected with Sansc. ubhau, i tiugw, Lat. ambo, 
oth. da, 
(1.) on both sides ; as amphipr ack vie on both sides, a poetic foot 
consisting of a short, a long, and a shor 4 he cet — moving ited 
way foremost, the name of an animal so moving. 
-) about, —— as, Gr. dupdéo, a bind about. No oxi 
occurs in English = , 
aoe 
4 
a 
