1888. ] BOTANICAL GAZETTE. 99 
many times when a young girl student, and in mature life, endeavorin 
se eer myself that I could if I would, but the odor of both lilac an 
eed seems to place a band about my head, which, as regards the 
Tine is ieatinle toa certain mHEH of politeness, if I am a guest in a ‘house; 
but the effect of the milkweed is so intensified that I think I should lose 
‘consciousness if I persisted one 3 in the inhalation. Jutta 8. Hoaa. 
Albany, N. Y. 
eee of N. Am. species of Fissidens. 
ing the measurements of leaf-cells and tie in the 
i, 1887, p. 1) 
should be. Those who hav casion to use these measurements are, 
SMe, requested to sata veh: a from them, é. g., = should 
read 1 oe Sey should be 184, and so on. C. R. Bar 
Madison; Wis., Mare h 1, 1888. 
An exchange herbarium. 
ean ideal botanical exchanke is one through which one can obtain at 
time any plant des red. At the New York meeting of the A. A.A S. 
‘i. a sa question of a botanical ‘exchan nge for this ‘country, and t 
Organize one if thought desirable and practicable. Suggestions fete 
€ach member of the committee mare been secured, as well as from other 
botanists, and information has been obtained in regard to the Botanical 
ni 
Te he committee, but some account of its method 
learned fro persons in this country who have obtained plants through 
: ount of the workings of the British Exchange, together with 
Suggestions for the management of one in this country, is e 
F numbers of the Torrey Bulletin and BoTANICAL GAZETT 
is a desire on the part of many that the exchange be located 
n e botanist of the Department of Agriculture has, 
nb dee on this basis, it will be ences an.extension of the system 
of distribution heretofore carried on by the Departmen 
ts management under special rules. In this case there would 
nie and the interchange of eeinians woul ade through the ected 
ee of posta Persons desiring specimens age Fucsgepe 4 be as e 
to contribute a liberal number in exchange for esire 
quickly establish a stock from which nearly Seay ane called for con 
1Die Laubmoose (Rabenh. Krypt.-Flora), p. 427 et seq. 
