ISCO makes u ν monitors

and fraction collectors

and

plant growth chambers

ISCO

spectroradiometers

and lots more.

Do you have our catalog ?

'See us at the Federation Meeting. Booth 822-Palmer House."

INSTRUMENTATION SPECIALTIES COMPANY, INC.

programmed gradient pumps

density gradient Eractionators

5624 SEWARD AVE. • LINCOLN, NEBRASKA 68507, U.S.A. . PHONE (402) 434-8265 Circle No. 52 on Readers' Service Card

CABLE ADDRESS: ISCOLAB LINCOLN

VOL 39, NO. 4, APRIL 1967 · 9 5 A