52 A
INDUSTRIAL
AND E N G I N E E R I N G
CHEMISTRY
Vol. 41, No. 5
L A B O R A T O R Y SWING-SLEDGE MILLS Capable of reducing soft, moderately hard and tough or fibrous materials to any degree of fineness between 1 in. •Mfem, and 20 mesh. T h e patented •k ' O p e n - D o o r " feature permits .* ready accessibility for cleaning. ; À\
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STURTEVAHT' ..eboratery ·»«««««
L A B O R A T O R Y J A W CRUSHERS Special Roll Jaw action simplifies close regulation of the product with capacities varying from 300 or 4 0 0 lbs. per hour at finest settings, to 1000 or 2000 lbs. when opened for coarser w o r k . Each part of the crusher is accessible for quick and easy cleaning.
Fast-Economical-Aeeur
L A B O R A T O R Y SAMPLE G R I N D E R Laboratory Sample Grinders are of the " O p e n - D o o r " disc type and are capable of very fine w o r k , producing products as fine as 100 mesh (coarser if desired) when w o r k i n g o n dry, friable, soft or moderately hard materials. Simply turn hand wheel to provide product regulation from 10 to 100 mesh.
LABORATORY C R U S H I N G ROLLS First designed especially for laboratory sampling work, Sturtevant Crushing Rolls are used regularly in many plants where there are limited outputs. Range of output for the 8 x 5 size is from '^ in. to 20 m e s h — a n d for the 1 2 x 1 2 size from % in. to 20 mesh.
The only sure way to maintain strict quality of products is laboratory control . . . and that calls for accurate sampling. Sturtevant Laboratory Equipment meets the exacting requirements of laboratory work. They are fast and accurate . . . provide true samples. R u gg e < 3 a n d dependable, Sturtevant equipment actually has all the features
of full size machines plus extra accuracy and wider range of adjustment. The "Open-Door" accessibility permits quick, thorough cleaning . . . prevents the possibility of previous batches from contaminating new samples. Investigate Sturtevant equipment for your laboratory. It will cut your sampling costs . . . help maintain strict quality of products . . . increase sales. Write for complete details and catalog.
STURTEVANT 105 CLAYTON
MILL
STREET,
BOSTON
COMPANY 2 2 , MASS.
Designers and Manufacfurer* of: CRUSHERS · GRINDERS · SEPARATORS · CONVEYORS · MECHANICAL DENS and EXCAVATORS · ELEVATORS · MIXERS
