( 223) 
where new forms of the rank of species have been observed 
to originate, under circumstances properly guarded against 
error. 
My investigations on correlations in leaves were finished 
and the results published in the Bulletin of the Torrey 
Botanical Club for September, 1903, being reprinted as Con- 
TRIBUTION 43 of the Garden publications. 
The studies on the life-history of polymorphic aquatics 
begun early in 1902 have been continued. This work en- 
tails extended cultures of aquatics under normal conditions, 
aquatics as terrestrials, and terrestrial species as aquatics 
during several seasons, and in addition to results concerned 
with the influence 0° various external conditions upon struc- 
ture and form may also be expected to furnish evidence upon 
the inheritance or non-inheritance of acquired characters. 
Dr. H. M. Richards has undertaken with me an investiga- 
tion of the influence of carbon monoxide and other gases 
upon plants. During the few months that cultural tests have 
been under way marked results of some importance have been 
secured which will be announced in due form after the work 
has been completed. It has been found necessary to take up 
the study of the effects of illuminating gas upon plants in con- 
nection with these experiments. 
During July, 1903, a trip was made to Jamaica for the pur- 
pose of arranging with the government a lease of Bellevue 
House and grounds at Cinchona. This establishment was 
found to offer exceptional facilities for botanical investiga- 
tions in the tropics, and the grounds placed at the disposal of 
the Garden will be of great service in the collection and for- 
warding of living plants for the Garden collections. My 
wife and daughter accompanied me on this trip, and we 
found the summer climate of Jamaica healthful and pleasant. 
Arrangements were made with the Hon. Wm. Fawcett, 
Director of the Public Gardens and Plantations of Jamaica, 
by which the Garden received the duplicate herbarium speci- 
mens accumulated by his department, including about 5,230 
specimens. 
