award, presented by the Associa­tion of American Physicians was in recognition of the value to clini­cians of his work (2). The great accuracy demanded and achieved by Van Slyke in all of his chemical methods, and demonstrated in his publications, practically single-handedly forced the standards of clinical chemistry upwards every­where. Improved procedures strengthened clinical diagnoses, and better treatment automatically fol­lowed.

In accepting the Kober Medal, Van Slyke commented (6) :

When in 1914, they moved Glenn Cullen and me from our quiet corner in Levene's laboratory to the Hos­pital, our chief feeling was one of deadly doubt that we could justify our existence in such a place. Both of us were simple chemists with no conception of clinical problems, and we were utterly uncertain that we could ever become useful to the .science of Medicine. It was a doubl that long pursued us and often re­turned. I wish that Cullen could be here today to know that in some part our abandonment of pure chemistry has been justified in your judgment.

That our interests were quickly ab­sorbed by the clinical problems about us was due to the way in which our new comrades of the Hospital Staff took us into their group, and almost by force imposed their enthusiasm and their problems upon us I t was our good fortune to be of an age with the young Hospital staff, so that we could share their dreams with the camaraderie that comes only with youth, profit by the free give-and-take of its creative ideas, and by the fire of its unsparing criticism.

One way or another, Van Slyke has made contributions to almost every facet of clinical chemistry. It is not the purpose of this report to review these contributions, nor his other contributions to organic chemistry and to biochemistry, for they are common knowledge. Of the fifty-five volumes of Chemical Absti-acts published to date, only three do not list his name in their indexes. A brief résumé of Van Slyke's career recently appeared in Chemical & Engineering News (1).

Amino Acids in Blood and Urine

A general indication of the ana­lytical nature of Van Slyke's contri­butions, and their far-reaching sig­nificance, is provided by brief ref­erence to his work on the determina-

Courtesy of The California Ink Company, Berkeley, Calif.

COLOR-EYEs the dual purpose colorimeter

Color-Eye is the work horse of the quality control laboratories at the California Ink Company of San Francisco, prominent ink makers and manufacturers of color dispersions for the paint industry. The instrument is used to run tests on color strength, to match color batches, and to check drift of color standards.

Color-Eye is dual purpose, combining an abridged spectrophotom­eter with a tristimulus colorimeter. This unique combination of measurement techniques enables you to maintain precise color-control, establish your own color standards, and even conduct special analytical color research.

Why don't you join the hundreds of prominent companies who use Color-Eye? For complete information, write for Bulletin CE 1160.

INSTRUMENT DEVELOPMENT LABORATORIES, INC. Subsidiary of Kollmorgen Corporation

70 MECHANIC STREET, ATTLEBORO, MASS.

Circle No. 4 on Readers' Service Card

VOL. 34 , NO. 9, AUGUST 1962 · 2 5 A