GEAIK-DUST EXPLOSIONS. 



33 













Fire in A. Mill shut 

 down. 



Mill started again. In- 

 duction coil with \- 

 inch spark used. 



Used induction coil. 5 

 attempts. 



Small pieces of flint. 4 

 attempts. 



Small pieces of flint. 6 

 attempts. 

















^ 























^' 











.., 2 cr 



c. 



c 



C 



c 



c 















f 

 R 



^ 



C 



c 



c 



c 











w ^ 



« C3 

 CO 



tJ 

 c 



c 



s 



c 





r 







! 





fi 

 " 

 S 







t 



o 



iz; 



3 

 C 



c 



c 











of 



^» 



csg 



ta c3 



2 large flashes . 

 2 flashes 



1 



c 







C 



o 



3 



C 



o 





o 



T3 



o 

 ■d 



O 



o 



c 



o 



•d 















6 



12; 



No. 2 feed dust (2 



quarts). 

 No. 3 elevator dust . . 

 do 



o 



m >■ 



Bob 



d 



§ 



o 



E 



a 



o 



■5 



c 



> 

 S. 

 « 



CO 



d 



a 



o 



CO 





t~ 00 o O — ?q 













O 



c4 







c4 



<^3 



-*■ 









02 



a 



^•H 



£^ 



afe: 



^■ 



Ti 







c o 





csaj 





T) 





CO 





-/) 



> 



1^ 





rfl 







i^ 



.c 



> 



H 



C3 





fi?o 



