322 EEY. G. HEK810W ON THE AESORPTIOIS' OF BAIN 



30th to August 3rd. They were all weighed before and after the 

 experiment, as before, in grammes to three places of decimals. 



Loss Apparent 



per cent. condition. 



Cedrus Deodara Partly in water. *09 Fresh. 



In air. -57 Dry and deciduous. 



Hedera Helix 2 leaves in water, 4 in air. 10*28 Fresh. 



In air. 10*26 Fresh. ! 



?> >> 



If » 



Syringa vulgaris 4 leaves in water, 6 in air. 3*11 Fresh. 



„ „ In air. 67*20 Dead and crisp. 



Thuja, sp.. Partly in water. 6*19 Fresh. 



In air. # 21*97 Fresh. 



Taxus baccata Partly in water. 4*52 Fresh. 



In air. 23*92 Fresh. 



Ilex aquifolia Partly in water. 1*84 Fresh. 



In air. ' 13'33 Fresh. 



These examples, taken from many others, show clearly that the 

 leaves in air on the branches which have other leaves in water 

 are easily and well nourished by the latter. In the case of Ivy 

 but little difference is seen between the two percentages. This 

 is due to the fact that, the transpiring surface of four leaves being 

 greater than that of the absorbing, the supply was not equal to 

 the demand. 



The following specimens, weighed when gathered, were left 

 without water for a day. They were then weighed again, their 

 losses per cent, being given below. They were then partly im- 

 mersed as before. They w r ere once more weighed on the follow- 

 ing day, after having been carefully dried. 



Corylus Avellana, first loss per cent. 49*60, subsequent gain per cent. 57*20 

 Berber is aquifolia „ „ 37*64 ,, „ 13*42 



Syringa vulgaris „ „ 35*70 „ „ 18*80 



In these three the foliage had faded to a considerable extent ; 



consequently the gain per cent, is very large. 



Hedera Helix, first loss per cent. 10*76, subsequent loss per cent. 7*30 

 Ilex aquifolia „ „ 13*93 ,, . „ 904 



In these two the transpiration exceeded the absorption ; but 

 the smaller loss after immersion, as compared with that before it, 

 indicates that these coriaceous leaves had freely imbibed water. 



■ 



Buxus sempervirens, first loss per cent. 23*95, gain per cent. 6*10 



Aucuba japonica „ „ 17*28 ,, „ . 4*58 



Primus Laurocerasus „ „ 22*35 „ ,» ^2'12 



Prumis lu$ita7iica l „ „ 18*49 „ „ '^6 



Thuja, sp. i „ „ 14*93 „ „ 684 



Cedrus Deodara „ „ 26*85 „ „ 45'OT 



Taxus baccata „ „ 20*92 „ ,, 25*46 



Viburnum Tinus „ „ 38*15 „ „ 44*21 



