442 Miscellaneous Intelligence. 
avoid 
the printer skillfully mixes the ink to the tint of the fern, a print is ob- 
vantage of being more durable, cheaper, and more expeditious. I 
send for your inspection, several prints of ferns produced by this pro- 
cess; and have, &c. Fercuson Branson, M.D. . 
Sheffield, December 18. 2 
8. Note on Thapsus verbascum; by H. A. RILey, (from a letter A 
to the editors, dated Montrose, Pa.)——It may be of interest to announce 
that a variety of Thapsus verbascum was observed by me the last season 
aring white flowers. 1 found it about four miles east of Montrose, Pa., 
in the southeast part of Bridgewater and northeast of Brooklyn town- 
ships, on the road to the village of Harford. It was intermingled with 
the common yellow variety, constituting about one-fourth the plants of 
this species. : 
9. Geological Survey of Pennsylvania.—By a recent act of the Le- 
gislature of Pennsylvania, the Geological Survey of the State, so long 
interrupted for want of Legislative action, is again in the hands of Pro- 
fessor H. D. Rogers. Although not under appointment for some years 
past, Prof. Rogers has been making progress with his work, and we un- 
derstand that his Report will soon be completed, after a re-survey of 
some portions of the state. The work will have a vast economical 
value, on account of the resources of the country in coal and iron, and 
e esides oth 
The Report will be fully illustrated by wood-cuts, maps and sections, 
besides numerous plates of fossils. 
10. Observatory of Altona.-The place in the Observatory of Altona 
made vacant by the death of Schumacher, has been filled by the appoint- 
ment of Dr. Petersen 
11. Cabinet of Minerals for Sale—A valuable collection of minerals 
: foreign and domestic, the property of a deceased physician, containing 
: two thousand specimens. Said collection will be disposed of for money 
or education. Please address M. Leach, No. 6 Harrison street, south 
Brooklyn. 
a 12. erican Association for the Advancement of Science.—The 
> annual meeting of the Association will be held in Albany, in August, - 
_ commencing with the 8rd Monday of the month. The officers for the. 
year 1851-52 are as follows: : ; 
i 
; a Prof. L. “Acassiz, President. 
fot Mie SF. Baro, Permanent Seeretary. 
W. B. Rocersp,General»Secretary. 
amp Ls ®a wae. Ph 
ai 
Pa 
