16 BULLETIN 306, U. S. DEPARTMENT OF AGRICULTURE. 
rich stage was reached, and consequently the second picking, Sep- 
tember 5, corresponds very closely to the first picking at Arlington 
Se 
VY .9A 3 
SE : : = 4 
70 = ie 
Seo | ff ete 
C50 i =|] Et i 
VS gop 11 Li iii. 
Nook ee 6 Tri tilt. 
wey i Bi iirti Ggeiidil. 
<- jo wm ff , | = | = | ee oh 
° ake beeen Beeeer 
e 3 32 2 swew 3 398 2 7wEW 7 ST 
W CW 
ARLINGTON, VA. SIADISONM, WIS. - | THUIONSVILLE, S.C. 
Fic. 9.—Diagram showing the alkaloidal content of the leaves of second-generation belladonna plants 
from cross-pollinated parents at two stages of growth at Arlington, Va., and Madison, Wis., and at one 
stage of growth at Timmonsville, S. C., during the first season, 1914. 
in so far as the stage of growth is concerned. It is evident from the 
results obtained that at all three stations these second-generation 
plants show the characteristics of the parents as 
‘90-—____ regards their alkaloidal content. Naturally, there 
gg are individual variations, and the plants at one 
station may be uniformly lower in alkaloidal con- 
tent than at another station, but the point to 
be observed here is that at all the stations it is 
true in a general way that the plants selected 
originally from parents of high alkaloid-yielding 
tendencies show generally a gréater percentage of 
ae eae Re alkaloids than those from parents of the opposite 
loidal content ofallthe tendency. ‘Table VI and figures 9 and 10 show 
ae hedsen, this very plainly. It must be pointed out, how- 
plants from each par- ever, that only a few plants were included under 
ee mena v» Jot 7w;, and this must be borne in mind when 
Timmonsville, 8. C., studying the averages. 
roe ne Ast season, ‘Tn order to -gather some information regarding 
the influence of climatic conditions upon alkaloid 
production, a tabulation was made of the principal weather characteris- 
tics at or nearthe three stations for the four months, May to August, in- 
clusive, of the year 1914. This compilation is shown in Table VII. 
So Se 
IF 2 7WEW 
PERCENTAGE OF ALHALO/DS 
Ny 
