228 | eieaitl Intelligence. 
fall set for bears or buffalos in a North American forest; and that the — 
oe height of full-grown trees of the Mountain Redwood, Sequois 
igantea, whee they still call Wellingtonia in Scotland) is full three ; 
hind d fee : 
Callen vulguris in Newfoundland.—Mr. Murray, late of the Geo- 
ia Survey of Canada, and now engaged in a survey 0 f Newfound: 
Jand, has brought to Montreal specie ns es this plant, vi were col 
lected ih udge abins ay, on the ast coast of Newfoundland: near Fer 
minute, or just long enough to destroy the Tif aa roduce con ntraction ‘ 
of the tissues, and afterward dr ying them rapidly by artificial heat — 
The drying is best effected by placing them upon an _ n cloth ue 
tightly upon a frame and supported a few feet above.a stove. Care shoul — 
be taken not to raise the heat too high, as the green hae change 
at a temperature near that of boiling water. By this process 1 have sue- 
ceeded in preserving the delicate shades of red, ‘purple and orange of the 
species found on the coast of New pil a ineluding Solaster pappom’ 
S. endeca, Cribella, Asteracanthion palfida, A -Littoralis, and various otbet 
aenies, specie of which are in the Museum of Yale College. 
a Present: is equally applicable to Echini and Crust. 
American Silkworm.—After numerous experiments, 
Trouvelot, +6 Mediord, Mass., has succeeded in rearin ng successfully, 
great nu rs, Altacus Polyphem us Linn., and in preparing from from 
nan keeles quality of silk, possessing great 1u lustre and streng 
sed pronounced superior to Japanese and all other silks, except the: 
Chinese, iy competent dada. 
The silk is unwound by a simple process perfected by Mr. 
each cocoon yielding about 1500 yards, This insect is very 
sipiid throughout the Northern States and Canada ; sae as it feeds 
si 
ry. 
Mr. Tees oe fy Bors increased his stock from year to we 
tele young from the eggs of the few individuals first captu " 
{ fey D ; 
possible. 
The first public notice of his experiments with this insect was 
Mr. Trouy eet ~ a meeting of the Institute of Technology, a 
pinkie. when he exhibited specimens of silk mam 
mn it, both ssartkesioecd and dyed. 
