CHILDREN'S GARDENS 155 



" Irrigation and Drainage," " Physics of Agriculture," 

 and " Government Reports.") 



Among other interesting experiments to learn how 

 water acts, are to test the strength of a dry piece of 

 paper, and then test the strength of the same paper 

 after it has been thoroughly wet. Tie string tightly 

 around a smooth stick, and note that wetting the knots 

 makes it bind tighter. 



The children may at first protest that the moisture 

 that is squeezed by the hands from the leaves of plants 

 is not water, but juice, and they are quite right. The 

 teacher must then explain that the juice is made up 

 of water mixed with other things which the plant has 

 added. That this juice is different from pure water, 

 can be shown in a very interesting way, which will 

 appeal to everyone. 



Put some grease on the hands. Gather fresh vege- 

 table leaves, or grass, and wash the hands thoroughly 

 with the juice. It will dissolve the grease, so that it 

 will wash off with plain, cool water. 



