of the illtrates from these suspensions compared with those from controls allowed to stand for equivalent periods. Less than -one per cent of the cells stained in any of these suspensions.Nevertheless, the filtrates from the suspensions exposed to carbon dioxide averaged one and one-half times as potent as the control filtrates, and four to seven times as potent as the filtrates from suspensions exposed to oxygen.Full details will be published elsewhere. JOHNR.LOOFBOUROW.
Nitrogen estimations carried out on the carefully separated enamel of sound premolar teeth give a mean value of 0071 + 0-015 % for the age group up to 16 yearsandO0083 + 0021 %for older age groups. These values are lower than those previously reported.
IN a previous communication [1935] attention was drawn to the presence of an easily assimilable non-protein nitrogenous fraction occurring in the pulses to the extent of 10-55 % of the total nitrogen and consisting mostly of the simpler polypeptides. The present study relates to an investigation of the amino-acid make-up of the fraction from the three well-known pulses, Phaseolus aconitifolius, Cicer arietinium and Phaseolus mungo. EXPERIMENTAL. Preliminary trials with P. aconitifolius showed that 0*5 % acetic acid was the best solvent, yielding the maximum amount of the non-protein-nitrogen. It was found that a 5 % solution of sodium chloride, whilst extracting the globulins and
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