2 SCIENTIFIC RECREATIONS. 



from a shock or a vibration. This is physical science in its infancy. It is 

 said that Newton was led to discover the laws of universal gravitation by 

 beholding an apple fall to the ground, and that Montgolfier first dreamt of 

 air-balloons while watching fogs floating in the atmosphere. The idea of 



the inner chamber of the eye may, in like manner, be developed in the mind" 

 of any observer, who, seated beneath the shade of a tree, looks fixedly at 

 the round form of the sun through the openings in the leaves. 



Every one, of course, may not possess the ambition to make such 



