14 MISSOURI BOTANICAL GARDEN. 
For comparison, the dotted line, 2, representing the average 
daily maximum for the same months, has been compiled 
from Dr. Engelmann’s tabulation of his observations coy- 
ering 47 years,* ending with 1882; and the dotted line, 3, 
represents the highest maximum ever reached for each day 
of this period, as recorded in the same tables. Though far 
DIAGRAM A. 
A 
‘ cele 
‘ 
\ “\ K ‘ \ Ne A Me \ ae 
N's y ae ill tl baal hel Ae Sh AN00 
7 u = t 
. . 7 13 
PS ~ 7\t Tht 4 * 7 t 
J “ y, ‘ Eas TCA XN f v WY +f \ f —“s 
; " Fg a sf r YN a Le Wa ed 
f ‘ s v 
” / — 
ie AN _ AAA 
al i“ awe’, Ps y 90 
POA PST) Pe ~ fo een Las 
tian OY fin Bs ac ee ty 
al) ale = a “| Sd eosin, 1 
Ps SU ™ SAA. iq 
Fame Jf v 7 _ \_ 
‘- = 
=. sie | 
3 af 
“a | ¥ 
T 
or 
l 
70| 
1 10 JUNE 20 30 10 JULY 20 31 10 AUG, 20 31 
SUMMER TEMPERATURES. 
more irregular than the curve of averages, as would be 
expected, the record for 1901 is lower than the average 
on but six days of the entire period considered, during the 
middle portion of which its course is approximately par- 
allel with and close to the curve of maxima for the entire 
47 years tabulated, and on no less than 22 days this latter 
curve is exceeded. 
The diagram marked B, covering the entire year, repre- 
sents the mean monthly temperature for 1901 in a full 
* Trans. Acad. Sci. of St. Louis. 4 3 496-508. — This record covers the 
hottest season recorded before the one just closed (1881), and there is no 
reason to believe that the direction or position of the curve would have 
been materially changed by the incorporation of the records of recent 
years, so I have not taken the trouble to average in the records derivable 
from the reports of the Weather Bureau. 
