Show why flour records Ile cords of tha th list ten anre show that about fuenty have occurred in cereal lour flour and feed mills bilth the ilia loss of north of property as nell ell as the killing or in juring of over two hundred 1 investigations regarding the causes of these explosions ami anti mb sequent cirei have not proved conclusively are hp the to be avoided nv olde in eight casca tile explosions arft art believed to have originated from the sparks pro deuced in to tle machines during the grinding prin ding process tiny particles of bravel gravel or metallic substances aul stances coining coming into contact alth the plates of the machine machina may I 1 enough sparks to ignite the dust within the machine another possible caus causo for cercal dut dust explosions suggested BUK la Is tle use of naked flames |