Eberbach CON-TORQUE STIRRER •
For Highly Viscous Materials
•
Hollow Spindle, Continuous Duty
Unusually high torque suits the ConTorque to many applications . . . resin reactions, stirring highly viscous mix tures, etc. The continuously variable transmission provides constant torque at any speed in the range 0 to 500 r.p.m. The agitator is gripped by screw chucks at top and bottom of the Hollow Spindle. N o . 77-889C Write
for Bulletin
$160.00 S40D
SCIENTIFIC
INSTRUMENTS & APPARATUS
EberbachCORPORATION ANN ARBOR. MICH.
tSlklUMtt 114*
For farther information, circle number 61 A-1 on Readers' Service Card, page 77 A
CARL ZEISS
The famous
ABBE REFRACTOMETER Made in West Germany
is available incorporating the following features : • Range of measurements: nD 1.3 to nn 1.71 and sugar percentage scale 0% to 95%. For liquids and solids by transmitted and reflected light. • Measuring surface of index prism always at horizontal position. • Observation telescope mounted stationary at an in clined position to carry out measurements at a relaxed posture. • Border line of total reflection and scales are observed simultaneously in telescope. • Measuring prism in heating mount can be easily inter changed. • All movable parts are fully protected by being entirely enclosed within the housing. • Special index prism in heating mount available for measurements up to no 1.85 (on special order only). • For highest - accuracy - measurements, an UltraThermostat with different constancy of temperature ±0.01° is available as an accessory. Free detailed literature sent upon request
CARL ZEISS, INC.,
485 F i f t h A v e . , N e w York 17, Ν . Υ .
Guaranteed uninterrupted repair service For furtker information, circle number 51 Λ-2 on Readers' Service Card, page 77 A
For further information, circle number 60 A on Readers' Service Card, page 77 A
VOL. 29, NO. 4, APRIL 1957 ·
61 A
