114 BOTANICAL GAZETTE [FEBRUARY 
the data (table VIII), there is a larger percentage of sporangia 
over the tantalum. Thus, with the exception of the first experi- 
ment, the number discharged in the direction of the tantalum lamp 
surpassed that discharged toward the carbon. 
TABLE VIII 
o 
4 
o 
i a3 aN 
3s = 
Tota 25 gS 
#3 23 
aT ee) 
cal 1S) 
3 23) 5 Z| 0] 40) 0]: bes 
231 43| 79\ 34 poe Ae 3] 2) 17) 32) 13)---]-- 
305 65 136 401 FS 4) ah. s1 op 28). -48l x4 Shes 
157 24) 57} 14) 2] I 1] 6] 4o| 1 re bers pe 
1039 7|\116| 323|107| x5| 3] 2] 2] 2) xl rs! ox} 24aizos|. 8}... -|--- 
76 I} 2 25| 1 3 at 6p ayy 6) eee 
4 I} 35) 164 29 ai Xt 2b 26/230) 3T]3 fan 
W975 2 1-B ak 2| 3) 36/164) 748170} 31; of] 6] rl 5! xxl 26/106) 283/135) 20) 1O\ 5 r 
100 7| 47| 11| 1 I 23] 4. ee sees 
507 5) 5) SG 358) SOLS ay EE OF EE SEES] SE) 331) 40) 3 te 
1442 |....]...|...] 1} 3] 8/208! s33i246| 24] 8 2| 7| 6| 28] 85| 183| 63| 6 3 a 
813 \5/11| 4 | 4 | 10] 15) 20) 58] r78) 77] x5| x5] x7] 16] 18] 25| 31| 65| 93| 71/ 18] 18] 9 | 5 |21/4 
174 1| 3) 20). 44 2 a) 4) 39) sh go} 22 Be 
240 t 20) gs} 18} «| 1 coebee, Hc St ger ee t7bo4 ase 
tz} 69) 17} 1 Deere | ee ae 
104 Tol 61 17| 3) Io} 2 tas 
184 Ig} IOI 19] 1 7, 28 iat 
19. 22} 62! 27| x 6| 55] 2 I ae 
123 Tal 35 a) XO} 642) 54): - foe hp 
231 -|.--[.--] 21 14] 4o|1x8] 266)162| 40] 18) 2} 2| x} 2| sojr22] 257/107| 42} 9) 3 |---| * 
44 SEO Ab Tp ee te oe EL RRL ABS ee ee 
43 ss ae Ll eet Si ee ears proses res 
561 6} G8) t46) 35) 5) S| SP a} ot 2] 81 56] 32a) 44) 7]: 21. eae 
Of the 36 sporangia discharged in the direction of the tantalum 
lamp in the first experiment, 23 (63.8 per cent) struck the glass 
within the r-cm. strip containing the opening. Of the 60 sporangia 
fired toward the carbon, 40 (66.6 per cent) struck within the 1-cm. 
strip containing the opening. In the second experiment, 79 (48-2 
per cent) of the 164 sporangia that are discharged toward the 
tantalum are found in the r-cm. strip over the opening; 32 (48 
per cent) of the 67 discharged toward the carbon are on the corre- 
sponding strip. In the third experiment the percentages which 
strike the glass on the 1-cm. vertical strip over the opening before 
the tantalum and carbon filament lamps are respectively 50.7 and 
50. In the fourth experiment 58 per cent of the sporangia fired 
toward the tantalum and 67.7 per cent of those fired toward the 
carbon filament lamp strike the strip containing the respective 
openings. 
