... it may be a forces the immigrant to wait five years at the very least, before he may aspire to trade union membership. ... The differentiation between the Negro and the immigrant is one of degree, and, therefore hard to establish notwithstanding its importance. ... an advantage that affects not only his ability to comprehend orders, read instructions, and the like, but, if one accepts the ... They may be the result of an acerbation of opposition and discrimination on account of his color.