HE normal product of fertilization in maize is a mature dormant seed T with a well developed embryo and starchy endosperm. All the many variations from this norm have been in a minus direction with regard to embryo or endosperm development and must be regarded as defective types. These defective types may be divided superficially into two groups on the basis of comparison of their growth to tha...

Let X denote the number of items declared defective in a sample of size n selected without replacemant from a batch of N items containing B defectives, where testing is fallible. In this note it is shown that the density of X, p(x, B), has a monotone likelihood

During a previous investigation in which a decreased production of 5-hydroxyindoles was demonstrated in phenylketonuric patients (Pare, Sandler, and Stacey, 1957, 1959), we observed that some non-phenylketonuric mental defectives had abnormally high serum levels of 5-hydroxytryptamine (5-HT). We have now extended our observations and tried to define the extent and significance of this finding.

The types of psychological problem noted in this article appear to have two common qualities?the likelihood of being ignored, and an urgent need of consideration. Their likelihood of being ignored probably arises from two main causes?long-standing blindness to their very existence, or a hurried and even half-conscious forgetting of them whenever they stir the minds of administrators in, and aut...