HEAT PHENOMENA. 



24' 



Table I.— COMBINATION SHAFT. ROCK TEMPERATURES— Continued. 



Feet. 



1,603 



1,605 



1,607 



1,809 



1,611 



1,613 



1,615 



1,617 



1,620 



1,622 



1,621 



1,626 



1,629 



1,632 



1,635 



1,637 



1,640 



1,642 



1,645 



1,647 



1,649 



1,651 



1,654 



1,656 



1,058 



1,661 



1,663 



1,665 



1,068 



1,071 



1,672 



1,675 



1,678 



1,681 



1,684 



1,687 



1,690 



1,693 



1,696 



1,698 



1,700 



1,703 



1,706 



1,709 



1,711 



1,714 



1,717 



1,720 



1,723 



1,726 



Mean I Mean 

 temperature i temperature 

 observed.' calculated. 



* Probable error of one of these ' 



' observations— ± 0°.5. 



