* 
114 Correspondence of J. Nickles. 
galvanoplasty is well known, and we may expect to see this branch of in- 
dustry illustrated in his work with new views and a precision and exact- 
ness, of which the first two eg have given us such fine examples. 
saflering humanity. The author rv unde the name of galvano- 
caustic, the series of sli executed by this means. 
baclete source of heat employed is a Grove’s vile, The instruments are, 
, different cauterizers ; 2, @ galvanic seton; 3, orte ligature” for 
bol davis where there is access to no other apne. spect yon and 
combining at once the advantages of an incision, ligature and cauteriza- 
tion. A eommutaior fitted to the conducting wires, serves to excite or 
suspend nese 
o-bave “e spoken of the ineisl vantages of cit method of a 
mall vessels 
appropriate instruments, we may cut, make incisions or cau- 
yr genet large or small, arrest hemorrhages, provoke the inflammation 
—-* the coagulation of the blood, ete. Moreover, being introduce 
, the galvano-caustic instruments excite no fear; ee: in place 4 
sanmiens of the finger will develop the requisite tefaperatu 
rystallogeny.—lIt is a long time since it was observed es ‘Nir. Marloye, — 
a skilful, constructor of acoustic instruments, that when the angle of a 
crystal is removed with a knife and the surface polished, the crystal, if left 
for a time in the solution, —- itself again. This fact has been 
called to remembrance by an observation of Dr. Marbach of Breslau, 
who adds to it.a supplementary sf of interest. The chlorate of soda 
crystallizes in the cubic system and its solution in water has no action on 
larized |i But when this Testes crystallizes, it produces orystals 
which have a rotatory power like rock erystal, some turning to the right 
and others to the left; and if the crystals of the same kind are separated 
from the other and dissolved an ew, not only the solution has no rotatory 
power, but also, if left to crystallize, it affords crystals of both kinds, 
although only those of one kind were used. 
This poten of the crystals is connected with the fact that = are 
Ko » and have the reverse hemihedrism corresponding to 
than fat the nla «5 eeeiitiied into a piace rolatian of - 
same salt; the © crystal forms new faces which present the right and ! left 
hemi edviatils 
Artificial milk—For some time a liquid has been prepared which 
said to have so far Rig carp pag tu a per pis ot mile ot 
