THE DOMAIN OF PHYSICS. THE PROPERTIES OF 



MATTER. -THE THREE CONDITIONS 



OF MATTER. 



ECTfON I, 



THE DOMAIN OF PHYSICS, OR NATURAL 

 PHILOSOPHY. 



Introductory. On the page opposite, you hare an 

 outline map of the wide realm of human knowledge. As 

 from a mountain top, you look upon the plain below, and 

 clearly see the position of each province, and its relation 

 to its neighbors. Through some of these provinces you 

 may have passed, and with them have become more or 

 less familiar. From the whole number we now select one 

 that promises enough of interest and profit to justify the 

 time and effort of careful study. Not satisfied with the 

 cursory glance, we seek more definite information. For 

 this, we must leave the peak and enter the plain; for 

 though distance may lend an enchantment, it also begets a 

 dimness fatal to our purpose. 



1. What is Science 7 Science is classified 

 knowledge. 



A person may have lived for years among plants, have 

 acquired a Vast store of information concerning them, 



