MALLINCKRODT CHEMICAL WORKS

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20 A ANALYTICAL CHEMISTRY RUNNING ΤΗΕ GANΤLET CHEMICALS run a veritable gant- let of tests before they are found worthy to be released under the Mallinckrodt label. Skilled hands handle, trained eyes observe every step of the trans- formation from raw material to fin- ished product. Craftsmanship and the exacting tests during and after manufacture produce substances that show identical properties in different batches. It is this UNIFORMITY in purity and strength that makes MALLIN- CKRODT products the precision chemicals, necessary for analytical use. CHEMICAL WORKS to Chemical Users MALLINCKRODT 80 Yeats of Service Mallmckrodt St., St. Louis 7, Mo. · 72 Gold St., New York 8, Ν. Υ. CHICAGO . PHILADELPHIA . LOS ANGELES . MONTREAL U N I F O R M D EP Ε Ν D A B L E - P U R I T Y

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20 A A N A L Y T I C A L C H E M I S T R Y

RUNNING ΤΗΕ GANΤLET

CHEMICALS run a veritable gant­let of tests before they are found w o r t h y to be r e l ea sed u n d e r t h e Mall inckrodt label.

Sk i l l ed h a n d s h a n d l e , t r a i n e d eyes observe every step of the trans­formation from raw material to fin­ished product. Craftsmanship and the exacting tests during and after m a n u f a c t u r e p r o d u c e subs t ances that show identical properties in different batches.

I t is this UNIFORMITY in puri ty and strength that makes MALLIN­CKRODT products the precision chemicals, necessary for analytical use.

CHEMICAL WORKS to Chemical Users

MALLINCKRODT 8 0 Y e a t s o f S e r v i c e

M a l l m c k r o d t St., St. Louis 7 , M o . · 7 2 Go ld St., N e w Y o r k 8 , Ν . Υ. CHICAGO . PHILADELPHIA . LOS ANGELES . MONTREAL U N I F O R M • D E P Ε Ν D A B L E - P U R I T Y