SOME WAU TIME IXSTAI.TuATIOXS ()F TYl'lOS ( )K 

 THE LABORATOlir 



;V KILNS DEVELOPED AT 



Contract i'laiit. Quartermaster's Corps 

 Rock Island Arsenal, Rock Island. 111. 



Naval Aircraft Factory, Philadelpliia, Pa. 

 Spruce Production Division. Vancouver. Wash. 



