3 



Boxing Gears. Construction work, and especially 

 concrete construction, usually goes on in a hurry with 

 a number of participating laborers. Take pains to 

 cover with well made boxes the gears of the mixer and 

 any other gears or drives, especially those adjacent to 

 the men. This is good insurance against accidents and 

 pays in the long run. 



Coal Needed for Boiler. Approximately 12 Ib. of 

 soft coal for I sq. ft. of grate surface for every hour. 



Covering Stack. Between times of running con- 

 crete or other times, when the mixer is out of use for 

 a few days, put any empty nail keg or a board over 

 the stack to prevent rain from rusting the flues. 



Flues. Keep the boiler flues clean. The writer has 

 used a blower shaped like an L with 48 in. and 24 in. 

 arms, made on the job from ^-in. water pipe and 

 a piece of hose. This is convenient and inexpensive. 



HORSE POWER. 



Absence of the engineer from the work, the boiler 

 should be found with low water, immediately shut off 



