Burch (1936), in a comprehensive review, was largely responsible for furthering recognition of the condition in America, and the number of cases that have been reported, mostly in the ophthalmological literature, during the past ten years is an indication that arachnodactyly is not of extreme rarity, and that many milder cases and 'formes frustes ' have previously passed unrecognized. Stewart (...

A preparntion of sheep's or calf's myocardium is described: the m. transversus cordis of the right ventricle. This lends itself to perfusion of its capillary bed as well as to the recording of membrane potentials from single fibers. When the Na concentration in the perfusate is reduced, the action potentials undergo changes that suggest that the •'•'sodium hypothesis" is applicable to cardiac v...