50 



INTRODUCTION TO GENERAL SCIENCE 



References : 



1. 1002:396. 



2. 1803:476-482. 



a. 1001:157. 



b. 1809:434. 



Theory Heat of Sun Partly Due to Radium, 

 Radium and its Transformations. 

 Contraction and Radium Produce Sun's Heat. 

 Heat from Radium. 



34. THE SUN 



Our sun is a vast sphere, one hundred and ten times the 

 diameter of the earth, and more than one million times its 

 volume. It rotates on its axis once in twenty-five and one 

 fourth days, and is distant about ninety-two million miles. 

 It is so hot that all the material of which it is composed exists 

 in the form of a gas or vapor. The heat is probably caused 

 by a contraction due to gravitation, the compression being 

 sufficient to produce the high temperature. The emanations 

 from radium may produce some of the heat, as radium has 

 been discovered in the sun. 



References : 



1. 1002:105-106. 



2. 1002:387-390. 



3. 1002:390-391. 



4. 1002:410-116. 



5. 1103:25. 



6. 1304:9-10. 



7. 1601:3-9. 



a. 1001:154-155. 



6. 1001 : 155-156. 



c. 1001:156-157. 



d. 1001 : 157-160. 



e. 1003:110-111. 

 /. 1004:166-167. 

 g. 1004: 168-169. 



Heat of Sun. 



Heat of Sun. 



Temperature of Sun. 



Constitution of Sun. 



The Apparent Motion of the Sun around 



the Earth. 



Heat of Solar System. 

 Sunshine. 



Temperature of the Sun. 

 Constancy of Sun. 

 Age of Sun. 

 Constitution of Sun. 

 Source and Duration of Sun's Heat. 

 Temperature of Sun. 

 Age of Sun and Maintenance of Heat. 



