TR:VXSPiUAriox OF pla:^ts. 



9 



/ 



I cousider tlio proof of tlieir elimination to reside in the general 

 agreement of tlieir results witli those of other plants treated in 

 the same wa^. 



r 



Cactus, 



A small specimen of a cylindrical Cactus, growing in a pot and 



protected 



as described 



, gave 



the followin 



g results : — 



1 

 1 



1 



1 



•12 

 •01 

 •18 

 •13 

 •22 

 •18 



1. 



G. 



B. 



V. 



CI. 



E-ange of temp. 



•11 

 •15 

 •27 

 ■2d 

 •14 

 ■17 



•07 

 •04 



.10 



(?) 

 •21 



•15 



•08 

 •K) 

 •17 



•07 

 •03 

 •21 



•05 



•05 



•12 



•23 



■26 

 •12 



•12 

 •10 



•14 

 ■03 

 •15 

 ■07 



1 



440 52° 

 54° GO- 



Total 

 Mean 



•84 

 •13 



•99 

 •16 



•57 

 •11 



•12 



•83 

 •14 



•61 

 •10 



44° G4° 



54 » 



lu tliis case yellow glass gives a liiglicr loss than red ; and as 

 this also occurred with Box, and with one of the Palm series, 

 but with neither of the Lettuce series, one is led to imagine that 

 the character of the epidermis may be an important factor, and 

 alter the effect of the light. 



Fern. 



A small Fern, apparently a species of Asplenium, waa experi- 

 mented with, simultaneously with others. It gave the following 

 results : 



Total 

 Mean 



E. 



Y. 



•78 



•87 



•76 



1-54 



•77 



•86 



•87 



3-95 

 •90 



2-96 

 •74 



G. 



■S6 

 •83 

 62 

 84 



315 



•79 



B. 



•72 



•60 



•65 



115 



3^12 



•78 



V. 



•77 

 •79 



•67 

 103 



3-26 

 •81 



This result obviously agrees with the preceding. 



Echeveria metallica. 



CI. 



■83 

 •50 



•75 



1-33 



3-41 



•85 



Two plants were treated as the others, and were placed under 

 each of the coloured glasses for three days. The mean of the 



^ 



UNN. JOUllK. — UOTA]N^T, TOL. XXII 



H 



