AS A FUNCTION OF LIVING PROTOPLASM. 299 
This indicates a gradual increase of transpiration in accordance 
with slight increments of temperature. 
As with Mushrooms so with etiolated Seakale, the effect of 
temperature becomes more marked when the specimens are 
transferred from a cool room to a warm one, and vice versá, as 
the following experiment shows :—Two specimens of Seakale of 
about the same size as the preceding, and carefully protected as 
described, were placed for twenty-four hours alternately in a cool 
room without a fire and ina warm one. They were not enclosed, 
but exposed to diffused daylight. 
Loss in Loss in . 
No. I. 24 hours. 24 hours. Min Aia: x. 
No.I No. II. P: P. 
1887. ammes grammes. o 
April 7-8 Cool room. 57580 1:83 44 51 
» 8-9 arm ,, 2:24 2:34 49 61 
» 9-10 | Cool ,, 89 -86 46 56 
» 10-11 | Warm , 1:46 1:55 48 69 
» 11-12 | Cool ,, 71 76 45 58 
„ 12-13 |" Dark ,, 130 113 54 64 
Transpiration compared with Evaporation. 
The two specimens of Seakale were scalded after the termina- 
tion of the experiments on transpiration. All superficial mois- 
ture being carefully removed, they were subjected for a week to 
successive coloured glasses by day and to total darkness at night, 
with the following results :— 
Colour of glass. | No. I. | No. II. | Min. Max. 
| o 
eee 115 :162 52 54 
RU ——— | 121 :201 52 56 
DL eQosseee | 7075 112 55 58 
A rere | 117 ‘210 51 58 
D. /—2sseees 074* | -133* 50 56 
G. — eese 060 10 52 54 
D. esere 048 ‘070 51 56 
Lr 050 050 52 54 
D. —. eee 033 047 54 56 
Ch, ue 043 048 50 58 
The first observation to be made on these results is that up 
to (*) the losses were greater by day than by night; subse- 
quently the evaporation steadily declined, apparent y age 
B 
