ARTICLES 



7i 



of water from a certain surface-area of Salicornia, during 

 regular periods, was thus obtained. The whole of the losses 

 for each individual sod were then reduced to a percentage, 

 i.e. to losses per 100 sq. cm. of plant surfaces, thus affording a 

 basis of comparison. 



The following chart (Fig. 2) sets forth the result : 



Time and Date 



.September' 1906 



Fig. 2. 



Showing the comparative weights, in grams, of water transpired per 100 sq. cm. of surface of (i) crimson 



Salicornia from mixed sod from which the apple-green had been removed (C. M. ) ; crimson 



Salicornia from pure sod (C. P. • • • • ) ; apple-green from mixed sod from which the crimson had been 



removed (G. M. ) ; and apple-green from pure sod (G. P. — ... — ). All the sods were cut 



from the Crimson Plain. 



The general results were as follows : 



1. Crimson plants transpire more rapidly than apple-green. 



2. The plants, whether crimson or apple-green, from mixed 

 sods transpire at a greater rate than those from pure 

 sods. 



3. The crimson plants from a mixed sod transpire more 

 rapidly than the apple-green plants from a mixed sod. 



4. The crimson plants from a pure sod transpire more 

 rapidly than the apple-green plants from a mixed sod. 



It will also be observed that the diurnal variation of tran- 

 spiration is well brought out in the chart, and that the amount 

 of transpiration is surprisingly high. 



The next experiments were made in order to compare the 

 rates of transpiration of Salicornia plants growing in different 



