SO.MK WAl; 'I'J.ME IXSTAI.LATIOXS OF TYl'KS OF KllV KILNS DFOVELOPKl ) AT 



THF LABORATORY 



Contract Plant, Quartermaster's Corps 

 Rock Lsland Arsenal, Rock Island, 111. 



Naval Aircraft Factory, Philadelphia, Pa. 

 Spruce Production Division. Vancouver. Wash. 



