1
P^
JIL
ESCAPE when you use
LEWIS PUMPS All parts subjected to pressure (except flange) are submerged in your tank— no suction valve is required! FOR M A X I M U M SAFETY H A N D L I N G SULFURIC A C I D !
CHAS. S. LEWIS & CO., INC. 8625
Grant
Road
•
St.Louis
2 3 , Mo.
serving the process industries since 1915 Circle No. 38 on Readers' Service card
22 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
38
