AUTOMATIC CLOTTING TIMER BRDIrrJOAL with this apparatus.Much time is saved wvhen large numbers of tests have to be performed, especially if Owren's methods are boing used.Just as important is the fact that much more reliab!e and reproducible results are obtained by using this automatic time-recording apparatus than with the hand-wate--bath techniqu?.The apoaratus was made for us by Evans Electroselenium Ltd., Colchester Road, Halstead, Essex.Cheap disposable glass tubes to fit the apparatus can be obtained from C. E.
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Shanker et al. (1960) studied this question.