Whatman filter paper A full range for all laboratory filtrations Qualitative papers for filtrations where acid washed papers are not required—low ash papers —double acid washed, ash-free grades—hardened papers for added wet strength and lint-free operations—extraction thimbles —ashless tablets—even black filter paper—all these plus special chromatography grades are available from Whatman. They are all listed in our catalog, and our Flow Rate and Retention Charts will simplify your selection of the proper Whatman grade for a specific job. Ask your laboratory supply dealer, or write direct to :
reeve angel H. Reeve Angel & Co. Inc. 52 Duane Street, New York 7, Ν. Υ.
For further information, circle number 66 A on Readers' Service Card, page 97 A 66 A
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ANALYTICAL CHEMISTRY
