BOTANICAL GAZETTE 
[AUGUST 









122 
TABLE VI 
RELATIVE PERCENTAGE OF MOISTURE 98; GRAM-MOL. 0.5 H.SO,; TEMPERATURE 35° C, 
No. of sets run atten". | sieubetidi > greieations Condition 
Pek yea wee. 208 3 ° Turgid 
BE ies Bios as 200 ° ) : 
he ee heer ei 198 ° ° . 
Ai ee oe 205 125 60.9 
5, ei on acing ee 223 146 64.5 Some bursting 
BEE ei ice 181 5 2.7 Turgid 
e SSO SE I epee 208 ° ° m 
EE es 195 165 84.6 . 
ts, OE, PMS Cris 183 98 53-5 . 
eens 
ee eo ae 1801 539 29.9 
TABLE VII 
RELATIVE PERCENT. OF MOISTURE 99; GRAM-MOL. 0.3 H,SO,; TEMPERATURE 35° Ge 




No. of pol a iti 
Mo otedsrm | Nol alin | Neat | Remmi | Condition 
a 
AOGG See Peers 219 ° ° Turgid 
pa ee an 167 ° ° 5° Det om 
: bursti 
ad. Ree ee ae 127 ° ° Turgid 
: eee oe 132 ° ° . 
be Sw ae. Giese. Saran 253 50 19.7 
se eee Re 218 100 5.8 ¥ : 
H Sey: 310 10 32.2 Much bursting 
 .. 435 8+ ; : 
on. _ 
eee 348 26 7-5 
eS 
OUNE  .. 2209 221 Io 






As seen from the tables, the percentages of germination in most 
of the sets run were low as compared with those obtained under 
bell jar on the laboratory table. This low percentage may be due 
to three things: (1) the membrane was not in equilibrium; (2) the 
amount of moisture required by different pollen grains for germi- 
nation may vary so much that only a small percentage of germi- 
— ar take place under a given moisture condition; (3) 
germination may be to some extent connected with transpiration. 
The marked variation in behavior between sets run over the same 
solution at the same temperature strongly suggests that moisture 
equilibrium had not been established within the apparatus. The 

