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SEE FOR Y O U R S E L F IN FREE LABORATORY DEMONSTRATION Write today for demonstration in your own lab, at your convenience . . . and for informative Catalog D-280. Bausch & Lomb Optical Co., 74806 St. Paul Street, Rochester 2, New York.
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LOAD-LIGHT-LOOK! T&p accuracy refracfomefry in seconds! EASIEST OPERATION EVER! Front, horizontal loading. Fixed prism assembly . . . wipes clean in a wink. D U O - S P E E D control knob .. . rapid scanning a n d fine line setting at the touch of a finger. FASTEST, TOP ACCURACY READINGS! N e w instant-reading precision scale, graduated directly to .0005. Quick, easy estimates t o .0001. ASSURES FULL-WORKING-DA.Y COMFORT! Eyepiece at convenient height and angle for relaxed sitting-position observation; DUO-SPEED control knob and line-scale switch in l o w position for hand-at-rest operation. PLUS . . . many other n e w features and new performance advantages setting the n e w standard for high-speed, highaccuracy refractometry. Find out now h o w they can ease your work load.
America's only complete optical source... from glass to finished product.
2870
C&EN
JUNE
II,
1956
