EVEKGEEEN TREES IN WINTER. 339 



cut-surface of wliich had been immediately immersed in water, 

 was at first brought into the room and then a shoot vigorous 

 enough for the experiment was cut off from it under water.^^ 



With tiiese precautions, I measured the intensity of trans- 

 piration in some twenty kinds of plants, including, besides foliage 

 trees, a conifer, a monocotyledon and also a fern ; and the results 

 are given together as follows, denoting the quantity of water 

 transpired from our evergreen trees in winter (Table IX ex- 

 periment 1-20)'^: — 



per n dm. ] er hour, 

 ingr. 



Gymnogramme japonlca 9 G.8 6 



Quercus glauca 95.66 



Thea Sasanqua 81.55 



Ligidaria Kœmpfcri 71.71 



Daphniphyll um macropodum 63.72 



Thea japonlca 62.24 



Eriohoirya japonica 59.15 



Fatsia japonica 55.79 



Pittosporum Tohira 55.36 



Aiicuha japonica 54.64 



Gardenia florida 53.54 



Podocarpus inacrophylla 52.57 



Nandina domestica 46.02 



Pasania cuspidata 41.30 



Cinnamomum LoureivH 40.95 



Photinia glabra 32.53 



Lig ustrum japonic urn 31 .53 



Ternslrœmia japonica 30.56 



Ilex crenata 24.62 



Aspidistra elatior 6.48 



1) Precautions for using cut-branches are given by Burgerstein, Materialien. II, p. 7. 



2) The temperature and humidity were not constant in tlie different experiments ; the 

 temperature varying from 11.5 to 7.4°C. in air, and from 12.6 to 6.4°C. in water. As to the 

 details, reference sliould be made to that section in which the experimental data are 

 treated of (Table IX). 



