Book Reviews : Down on the Killing Floor: Black and White Workers in Chicago's Pack inghouses. 1904-54. By Rick Halpern. Urbana and Chicago: Univer sity of Illinois Press,1997. 309 pp. $17.95 paper,$44.95 cloth

Book Reviews : Down on the Killing Floor: Black and White Workers in Chicago's Pack inghouses. 1904-54. By Rick Halpern. Urbana and Chicago: Univer sity of Illinois Press,1997. 309 pp. $17.95 paper,$44.95 cloth