60 



JOUItXAL OF THE ROYAL HORTICULTURAL SOCIETY. 



of garden plants to which light seems positively injurious. 

 .Further experiments are desirable. 



Secondly, no specially coloured light, or combination of lights, 

 which do not collectively constitute pure colourless daylight are 

 ever so good or effective as natural sunlight itself; as each ray 

 ^eems to require the assistance of all the others for the full exer- 

 cise of plant functions. 



Thirdly, that when a comparison is made between plants 

 growing under ordinary window-glass and in the open, the 

 injurious effect of the glass becomes very apparent for ordinary 

 plants of a temperate climate. The deleterious effect is pre- 

 sumably due to an excess of heat, by which respiration is 

 stimulated and assimilation reduced. If, therefore, " scorching " 

 is to be subdued, it must be done by some means which reduces 

 ■the heat-rays without lessening the whole amount of white light, 

 or at least without diminishing the amount of any one or more 

 individual ray of the spectrum, as by the passage of the light 

 through water. 



Lastly, the experiments, especially those of Lettuces, show 

 dearly that growth under ordinary conditions in open ground is 

 much the most preferable in every way. 



FLOWERS OF THE FRENCH RIVIERA. 

 By Mons. Henry de Vilmobin, F.R.H.S. 

 [Read March 23, 1893.] 



WINTERING on the Riviera has become such a common feature of 

 modern life— so many invalids or pleasure-seekers resort annually 

 10 the sun-warmed shores ofHyeres, Cannes, Nice, and Mentone — 

 that most educate:! Englishmen of our days are perfectly familiar 

 trith the climate, Bights, and produce of Maritime Provence. 



And not only to actual visitors is the floral wealth of the 

 Riviera displayed on the spot, but, thanks to the ever-increasing 

 rapidity and cheapness of the means of transport, immense 

 quantities of cut flowers are despatched daily to the central and 



