GLIMPSES INTO PLANT-LIFE 



We must first provide a lari^e glass jar three parts 

 full of clear water. Then a lamp chimney, to the 

 bottom of which a piece of membrane fwhich any 

 butcher will supply) has been affixed, should be 

 partly filled with water 

 coloured by sulphate of cop- 

 per, and then suspended in 

 the glass jar. Through a cork 

 fitted to the top of the lamp 

 chimney a long tube should 

 be inserted. The fluid in the 

 lamp-glass \y\\\ be seen to rise 

 in the tube shortly after the 

 experiment is made, and the 

 clean water in the large jar 

 will become slightl}' coloured. 

 This experiment teaches us 

 that liquids have the power of 

 TKAxsKusiox iHACRAM. passlug through a membrane; 

 this power is known as diffusion, or osjnosis. Fur- 

 ther, we notice that the clear fluid passes into the 

 coloured water more rapidl)' than the heavy 

 coloured water passes out. 



Now the fine 7-opt Jiairs of a growing plant are 



