Glarenci King — Age of tin Earth. 



Table Xo. 2. 



Estimated Earth Temperatures. Initial excess 



secular cooling with surface rate of 1' 



Thermal conduction 400 ft-/year 



of 3900° C. IOC millions of years 

 ' F. for 50-6 feet of depth. 

 (Lord Kelvin's case). 



Miles 



Rate in 



Rate in ° C 



Temperature 



Depth in 



deep. 



P and ft. 



and meters. 



in ° 0. 



earth radius. 







•01977 



•03600 







•ooooo 



12 



01924 



•03510 



726 



•00312 



25 



01773 



•03230 



1412 



•00625 



50 



01279 



•02330 



2543 



•01250 



75 



00742 



•01350 



3275 



•01875 



100 



•00346 



•00630 



3658 



•02500 



125 



•00129 



•00236 



3825 



•03125 



150 



•00039 



•00071 



3881. 



•03750 



175 



•00009 



•00017 



3897 



•04375 



200 



•00002 



•00003 



3901 



•05000 



225 



■ooooo 



•00001 



3902 



•05625 



250 



•ooooo 



•ooooo 



Table No. 3. 



3902 



•06250 



Estimated Earth Temperatures. Initial excess 1741° C. (about melting point of 



platinum) 20 millions of years secular cooling with surface rate of 



1° F. to 50'6 feet of depth. Thermal conduction 400 ft'Yyear. 



Miles 

 deep. 



Rate 

 ° F aud feet. 



Tempera- 

 ture ° O. 



Depth in 

 earth radius. 







•01977 







•ooooo 



6 





359 



•00156 



12 



•01726 



693 



•00312 



25 



•01147 



1218 



•00625 



37 



•00581 



1534 



•00937 



50 



•00224 



1675 



•01250 



62 



•00066 



1725 



•01562 



75 



•00015 



1738 



•01875 



87 



•00002 



1741 



•02187 



100 



•ooooo 



1741 



•02500 





Table 



Xo. 4. 





Estimated Earth Temperatures. Initial excess 1230° C, 10 millions of years 



secular cooling with surface rate of 1° F. to 50-6 feet of depth. 



Thermal conduction 400 ft' 2 /year. 



Miles 

 deep. 



Rate ° F. 

 and feet. 



Temperature 

 " C. 



Depth in 

 earth radius. 







•01977 







•ooooo 



12 



•01506 



662 



•003 1 2 



25 



•00665 



1063 



•00625 



37 



•00171 



1198 



•00937 



50 



•00025 



1227 



•01250 



62 



•00002 



1230 



•01562 



75 







123L 



•0J875 



87 







1231 



•02187 



100 







1231 



•02500 



