CHARACEZ: OF AMERICA. 
e first fasicle of the second part of the Characeae of America is ours eady. It con- 
dios. aitcntoos of eight species of Nitella, as follows: Nitella opaca A oun Alten, 
90 hee Allen, deat ee in Allen, Missouriensis Allen, ilexilis Ag., subglomera 
A. Br., and giomerulifera A with fourteen full-page illustrations (eight lithogra- 
Ha pl ates and six i sa ures. ) These fasicles will be issued from time to time as 
aap a a Lek gah) agg of each part $1.00—the actual costif the whole edition of 
copie 
T. F. ALLEN, 10 East 36th St., New York City. 
SCIENCE (Weekly.) $3.50 per Year. 
Eleventh year (1893), More than roooof the leading scientific men and women of 
ai ecide and Europe have agreed to contribute, 
omm a Sov will be weicomed from any quarter. Abstracts of scientific papers 
are sagen and twenty copies of the issue containing such will be mailed to the author on 
request in advance. N. D. C. HODGES, 874 Broadway, New York. 
or nClALLY: PREPARED 
Herbarium Paper? Botanists 
This paper is offered at the moderate price of $5.50 per 
ream. We also furnish— : 
No. 1 Genus Cover, 1634 x 24 inches, at eet per 100 
2? ““ éé 66 2.50 ‘“ 
3 o6 “ec sé tT: 50 oe 
Dryers, ~ 2:00 * 
Speeies sheets, 1632 x23% “ 60 3" 
Orders will receive prompt attention. Write for samples. 
E. MORRISON PAPER CO., 
1009 Penna. Avenue, N. W., Washington, D. C. 
BAUSCH & LOMB OPTICAL CO., 
MANUFACTURERS OF 
MICROSCOPES, TELESCOPES, 
PHOTOGRAPHIC LENSES. 
AND OTHER OPTICAL INSTRUMENTS 
Faetory and Office ; ROCHESTER, N. Y.—531-543 N. St. Paul Street. 
Branch Office ; NEW YORK.—48-50 Maiden Lane. 
umber of improvements ye additions 
in the. line of microscopes, will be sent’ iene on  agoeemnn to any person interested in 
oscopy. 
