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sary with the Haines solution. When the solution of Folin and McEllroy was used with phosphate-free urine, the contact ring in normal urines was so marked that it could not permit of the use of this contact test. This improved Haines test has the following advantages : 1. The reaction is concentrated to a single plane, thus increasing its visibility. 2. Only one heating is necessary, and there is no long standing before the reaction appears. 3. It will demonstrate pathologic sugar in amountsdoi:10.1001/jama.1920.02620050010004 fatcat:hoa2yr5spjhiflzjm4cgkrpw6y