Horizontal versus vertical display of numbers

A task was constructed to compare performance on a horizontal to that of a vertical array of 3-digit numbers. 16 Ss were required to scan arrays of pairs of numbers and mark the pairs that contained nonidentical members. The average time required to complete the vertical array was 73 sec and 44 sec. for the horizontal. The finding that an average of 66% more time was spent on the vertical than on the horizontal array is significant at the .005 level.

Juvenile hormone activity for the bug Pyrrhocoris apterus

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Enzymatic Mechanism for the Escape of Certain Moths from Their Cocoons

An "escape hatch" from the cocoon of Antheraea pernyi is established by the hydrolytic action of a virtually pure proteinase which the moth first secretes and then dissolves by means of a solvent which maintains the enzyme at optimum pH. The proteinase is both synthesized and secreted by the maxillary galeae. The solvent derives from a pair of labial glands which have the form of long convoluted tubules lying alongside the foregut and opening to the exterior through a single aperture in the head.