156 INTRODUCTION TO GENERAL SCIENCE 



d. 1305:205-206. Streams. 



e. 1306 : 228-230. Springs and Artesian Wells. 

 /. 1309 : 41-43. Hot Springs and Geysers. 



g. 1311 : 100-104. Mineral Springs, Geysers, and Wells. 

 h. 1312:51-52. Spring Deposits. 



i. 1902 : 135-136. The Contamination and Purification of 

 Streams. 



114. COMPOSITION OF WATER 



For a long time water was considered as an element and not 

 a compound as we now know it to be. In Section 66, Chem- 

 ical Effects of Electricity, we learned that water could be 

 separated into two parts of hydrogen and one part of oxygen, 

 both by volume. It can be shown that the same proportion 

 of hydrogen and oxygen may be mixed and exploded, pro- 

 ducing nothing but water. Also, hydrogen may be burned 

 quietly with the same result, without the explosion. See Sec- 

 tion 1, Explosions. 



Hydrogen, as a word, means " water producer." It is very 

 useful for obtaining high temperatures, since the flame of 

 hydrogen, burned in oxygen, is the hottest known flame. If 

 such a flame impinges upon a stick of unslaked lime, the lime- 

 light, sometimes called the calcium light, is produced. The 

 light nearly all comes from the intensely hot piece of calcium 

 oxide, or lime, which does not burn or fuse. Hydrogen is the 

 lightest gas and is used to fill balloons where great lifting 

 power is desired. 



References : 



1. 1702 : 56-57. Chemical Composition of Water. 



2. 1703 : 38-39. Nature of Water. 



a. 1701 : 40-42. Composition of Water. 

 6. 1704 : 24-26. Composition of Water, 

 c. 1706 : 50-58. Composition of Water. 



