537 



* 



temperature was warmest over Gentiana acaulis, the greatest differ- 

 ence being 7' 9. 



3. Eight observations on Iberis sempervirens in comparison with 

 grass. 



The mean gives Iberis sempervirens 2'3 warmer than grass. The 

 temperatures range between 41 and 63' 2. In seven cases the 

 temperature was warmest over Iberis sempervirens> the greatest 

 difference being 3'l. 



4. Ten observations on Alyssum tortuosum in comparison with 

 grass. 



The mean gives Alyssum tortuosum 2 '3 warmer than grass. 

 The temperatures range between 41 and 88' 9 ; in every case being 

 warmer than grass, the greatest difference being 3'7. 



5. Eleven observations of a white Daisy in comparison with grass. 

 The mean gives the Daisy 0'2 hotter than grass; the range of 



temperature from 40'3 to 80'5. Greatest difference 4-4. 



6. Seven observations of Veronica alpina in comparison with 

 grass. 



The mean gives Veronica alpina 1*9 warmer than grass ; the 

 temperature ranging from 42*8 to 65 0< 5. In no instance was it 

 lower than grass. Greatest difference 5*0. 



7. Seven observations of Alyssum tortuosum in comparison with 

 Reseda frutescens. 



The mean gives Alyssum tortuosum 2 '4 hotter than Reseda 

 frutescens. 



8. Thirty- three observations of Tulipa Gesneriana in comparison 

 with grass. 



The mean gives Tulipa Gesneriana 1'9 hotter than grass; the 

 temperature ranging between 31*4 and 96'5. In twenty-five in- 

 stances it was warmer than grass. Greatest difference 12'8. 



9. Twenty-eight observations of Eschscholtzia crocea in compari- 

 son with grass. 



The mean gives the Eschscholtzia 3'6 warmer than grass ; the 

 temperature ranging between 37 and 102*3. In twenty-four in- 

 stances it was warmer than the grass. Greatest difference with black 

 bulb 15-7. 



10. Ten observations ofLilium concolor in comparison with grass. 

 The mean gives Lilium concolor 2 '9 warmer than grass ; the 



