64 The Botanical Gazette. [February 
Without going into the discussion in regard to the influence 
of colored light on plant transpiration and assimilation, | 
will give the average results obtained from a series of ex 
periments. The conditions of temperature and moisture wert 
constant in all cases. 
White light, diffused, required 54 ds t porate 25 mm. 
Yellow ae “ae sé 60 ae ae 25 “ae 
Red ae of ai 62 “ce oc 25 “ 
Green ae ac af 64 ae ce 25 ce 
Darkness " 72 de si 
25 oo 
The results obtained agree quite closely with those obtainel 
more luminous rays of the solar spectrum. 
6. Solanum tuberosum, small plant, strong roots, no tubers. 
5 re 
: Tem.| Tem. /Tem oo Pre Time in seconds required to 
Time| Color.| of | of | water or evaporate 5™m of water Progress. 
Hig-°Cair°Cs! © °c: ormal column, 
ii 
11:30 | White | 21.5 | 22 | 2 Normal! tt, 11, 11, 10, 11, 11,10 10,11,11,10 Ether introduce! 
10:34 dif. Lo hsis 22 21 Ether. Ir. rr, rx, 12, 11, 10, 11, 11, 11, 12)After 10 ne 
11:46 - 15 | 22 | ar Ether. |13, 14, 13, 13, 14, 13. 14, 14 14)ether remo 
II 5 | 22 21 Normal rr, 11, 11, 10. 10, 11, 10, 11, 11, 11) Yellow |. 
11:53 |Yellow.| 21 22 21 Normal 11, 11, 11, 10, 11, 11, 11,11, 10,11, 11|After 10 min 
12 i I 22 21 Nofmal 12, 11, 12, 15,-%2,. 21; 2,1) 3,ethet nt ved. 
12 a 21 22 21 Ether. |15, 14, 14, 15, 14, 14, 15, 14/thes remo 
12 21 22 ai Normal 12, 11, 12, 12, I1, 12, 12, 11, 12, I. 
12:25 Red. Si8- ae 2b75- | Normal 12,35, 32, 12;-11,-12,:-12,.. 12,43 After 10 rroducel 
12:38 . ZL5.) 24 21.75 |Normal 12, 13, 13, 12, 13, 13, 12, 13, 13/ether int oe 
12:45 “| an5 | 22 | 21.75 |Ether. |15, 16, 16. 15, 15, 16, 16, 15, 16|Ether remo 
12 23.5 | 22.25] 21.75 |Normal'r2, 13, 12, 13 13, 12, 13, 12/Gree ae 
12:52 Green aI 22.25] 21.75 |Normal 12, 13, 12, 13. 13, 12, 13, 12, 13|After 15 reoducel 
I . I 22,25) 21.75 |Normal'r3, 13, 14, 13,14, 14, 13, 12, 13,ether pci 
OR 22.25) 21.75 E er. |16, 17, 16, 17, 16, 17, 16, 16, 17,17 a cneril eee 
22.25! 22 Normal 13, 13, 14, I 03, 22, 14): 2S 
1:36 Dark 21.5. | 22.5 | 22 Horaallss, 12 = 3% t3; a 12, ‘14,83 After 30 dues 
a . 1.5 | 22.5 | 22 Normal 14. 15, 14, 14, 15, 14, 15, r4jether 18 
ser 2 21.5 | 2a§ |. 92 Ether. |16, 17, 19, 18, 19, 17, 18, 18, 19|Hther r€ 
™ 21.5 | 22.5 | 22 Normal|14, 15, 14, 14, 13, 14, 14, 13, 14/E0 
I experimented also with Fuchsta and Geranium with re 
results given above. These experiments indicate that the d 
ferent colors of the spectrum do not affect the influence” 
ether vapor on plant transpiration. ; 
Il. RELATION OF ATMOSPHERIC MOISTURE TO [NFLUENE 
OF ANASTHETICS. ne 
Atmospheric moisture does not affect the influence of ethef 
vapor on transpiration, as the following experiments *" 
Kohl claims that transpiration is zero in the saturated atmos 
