COLOUR. FLOWERS. 40 i 



Q. WHY do some tilings reflect ONE COLOUR, 

 and some ANOTHER ? 



A. Because the surface of things is 

 so differently constructed, both physically 

 and chemically; and, therefore, some 

 things reflect one ray; some two rays; 

 some all the rays ; and some none. 



Q. WHAT mainly determines the COLOUR of 

 any object ? 



A. The fluid or gas either in the 

 body, or on its surface. 



N. B. Nitrogen gives green, Oxygen gives red, 

 Hydrogen gives blue colours. 



Q. Why does DYING a silk, dc. CHANGE its 

 COLOUR? 



A. Because the materials used in 

 dyeing alter the chemical construction of 

 the substance dyed. 



Q. Why is a ROSE RED ? 



A. Because the surface of a rose 

 absorbs the blue and yellow rays of light, 

 and reflects only the red ones. 



Q. WHY does a rose absorb the yellow and 

 blue rays, and reflect the RED ? 



A. Because the action of the sun's 

 rays on the oxygen (accumulated in the 



Ma 3 



