1922.] PUBLIC DOCUMENT — No. 31. 41 a 



ordered will be necessary at fourteen places. It is of interest 

 to note that, in general, machines were in greater need of 

 repair than for any time in recent years, presumably on ac- 

 count of the present business depression which caused owners 

 to defer making repairs as long as possible. The recent ex- 

 plosion of a machine in a milk plant near Boston, which re- 

 sulted in serious injury to two men, should serve as a warning 

 to those using machines out of repair. 



