“…The method has been improved and simplified by Tramer & Wight (113), who have introduced permanent colour standards so chosen that the results correspond closely to those obtained in the official Kay-Graham test. Kosikowsky (114) has modified conventional phosphatase methods to obtain a procedure applicable to a variety of liquid and solid dairy products. In collaboration with Dahlberg(ll5, 116), he has developed for testing cheese a technique characterized by the extraction of the free phenol with ether.…”