North American Check=-List. 
Of the Numbered Check-list of North American Plants, but 
about 49 copies remain for sale. Those who desire a copy should 
write for it at once, as the edition will soon be exhausted, and I 
do not expect to reprint the list. One style‘only, the mailing list 
on light paper. Price, 75 cents. Address, 
H. N. PATTERSON, 
O@UAVW EA, ILL. 
Mexican Plants for Sale. 
Having decided to limit my herbarium to the species growing 
north of the Mexican boundary, I offer for sale my Mexican speci- 
ey including a set of the exclusively Mexican species of 
Pringle’s collections of 1885 to 1893. Fine specimens, about 1,700 
numbers, nearly one-fourth new species. For particulars, address, 
: H. N. PATTERSON, 
O@UAWKA, ILL. 
Cambridge Botanical Supply Co. 
Successors to all Business in Botanical Supplies in 
CAMBRIDGE, MASS., 
DEALERS IN 
Herbarium and Laboratory Materials and Ap- 
paratus, Microscopes, Books, Specimens, 
Everything Useful to Botanists. 
a SATISFACTION GUARANTEED. « 
og ne 
WILLIAM WALES, Fort Lee, N. J. 
MANUFACTURER OF 
FIRST-CLASS MICROSCOPE OBJECTIVES. 
MICROSCOPES FURNISHED OF ALL MAKES—ZENTMAYER’S AL- 
WAYS ON HAND. INSTRUMENTS ORDERED IN NEW 
YORK CITY SENT ON APPROVAL. 
DISCOUNT TO COLLEGES. 
. 
