" 5- ies a 
228 Miscellanies. 
“Mr. Wilkes has repeated Crosse’s experiments on the production of 
Accari, and appears to have used every precaution for excluding and 
killing the ova of any animals, and yet these Accari appeared. But I 
cannot think that any physiologist will for a moment admit that the in- 
sects were produced by galvanic action, or even more readily developed 
by it; although the latter is not impossible.” 
Aimospheric Railroads.—A road of this description is about to be 
Jaid down from Bristol, England, to Partis Head. It would appear, 
therefore, that confidence is reposed in this new power of progression 
in travelling. 
20. Columbite.—In a series of chemical examinations of the several 
varieties of Columbite from different localities, Prof. H. Rose has ob- 
tained the following for the composition of a specimen from this country. 
Columbic acid, 79°62 ; protoxyd of iron, 16°37; protoxyd of manga- 
nese, 4°44; impure oxyd of copper, 0°06; oxyd of tin, 0-47; witha 
trace of lime,—= 100-96. Specific gravity of the specimen, 5-708. 
Streak dull reddish brown. ‘The particular locality was not known. 
Specimens from Middletown, Conn., afforded a specific gravity, when 
reduced to powder, varying from 5:-475—5:495. The Bodenmais Co- 
lumbite, in crystallized specimens, afforded the specific gravity 6390, 
and the composition columbic acid, 81:34; protoxyd of iron, 13°89; 
protoxyd of manganese, 3°77; impure oxyd of copper, 0.10; oxyd of 
tin, 0-19; traces of lime, =99.29. In other specimens the specific 
gravity varied from 5°6996 to 6-078. 
21. Gray Antimony.—Prof. O. P. Hubbard reports a locality of 
this mineral in Lyme near Dartmouth College. Loose specimens were 
found, as mentioned in Jackson’s Report on the Geology of New Hamp- 
shire, some two years since. It is now found in place, in crystals three 
and four inches long, in veins of quartz intersecting granite. 
22. Postage of Printed Sheets in England.—We had occasion to send 
to our correspondent thirty three pages of printed proof—one page 
over two sheets. For this, he remarks that he paid lls. 6d. I wish, 
he observes, to call your attention to it, as it might be well to notice in 
your Journal, that the British Post Office charges for all printed papers 
or pamphlets; and English savans are often put to great expense from 
foreigners not being aware of this circumstance. 
ERRATA. 
Page 183, 1. 18 from bottom, for ‘‘ Palagia,” read “ Falagria;” 1. 16 fr. bot. for 
‘ flavicernis,” read “ flavicornis.”” P. 185, |. 17 fr. bot. for “ zreola,” read “ ene- 
ola;” 1. 11 fr. bot. for “ Athoiis,” read “ Athous;” 1. 10 fr. bot. for “ zreolus,” 
read ‘* eneolus.”’ 
