LICHENES BOREALI-AMERICANI. 
Second edition of Decades of N. Am. Lichens. 
REPARED BY 
Crara E. Cummincs, Tuos. A. WILLIAMs AND A. B. SEYMOUR. 
Numbers 1-80 Ready in May. 
This second edition is prepared in response to urgent requests, t the sub- 
scription list of the first being full. The second will contain nothing that is 
not in the 4 e editors are glad to announce that Prof. Thomas A. Will- 
iams will hereafter be one of their number. His name will appear with first 
sition also after No. 150. Address, 
Aw E. Cummines, Wellesley College, Wellesley, Mass. 
CARD INDEX OF GENERA, SPECIES 
AND VARIETIES OF PLANTS 
PUBLISHED SINCE 1885 
BY 
JOSEPHINE A. CLAS 
The first issue of 1000 cards now ready. Address: se S St. N. W. 
canine D. C. 
Acme Microscopes.. 
In both ‘‘American’’ and ‘‘Continental’’ Models. 
THE IMPROVED GRAY BOTANICAL MICROSCOPE, 
| Bice ea 1.65 &S* 
THE QUEEN PLANT PRESS 
(Light and Strong.) 
Our New Solid Comfort Dissecting Microscope: 
BOTANICAL PAPERS at reduced 
prices. (Special rates to schools 
and colleges, in quantity.) 
MAGNIFYING GLASSES, SCALPELS, 
and other supplies for science classes. 
QUEEN & co. 
1010 CHESTNUT ST. 
PHILADGLPHIA. 
N. Y. OFFICE, 116 FULTON ST. 
