P H O T O V O L T
Densitometer
ror
Partition Chromatography and Paper Electrophoresis
HOEPPLER VISCOSIMETER PRECISION MODEL
VISCOSITY DIRECTLY IN CENTIPOISES
FALLING BALL
(from 0 ° C to 100° C) EQUALS Β χ (Sb-Sf) χ Time Β = Ball Constant Sb = Sp. gr. of ball Sf = Sp. gr. of fluid
A photoelectric precision instrument for the rapid and convenient evaluation of strips and sheets of filter paper in partition chromatog raphy and paper electrophoresis. Write for Bulletin #800 to
PHOTOVOLT CORP. 95 Madison A v e . N e w Y o r k 1 6 , Ν . Ύ. Also Colorimeters pH meters Electronic Photometers Reflection Meters Multiplier Photometers Fluorimeters Glossmeters Interference Filters Nephelometers
The Hoeppler Viscosimeter pro vides a fast and accurate method of determining the viscosity of gases, liquids, oils, plastics, syrups, vis cous tars and dark colored liquids. Direct reading in centipoises (or centistokes). From 0.01 to 1,000,000 centipoises. Accuracy 0 . 1 % to 0.5%. Small sample (30cc) re quired. Results consistent and reproducible. Order direct or from leading laboratory supply dealers. Write today for Bulletin HV-303Manufactured by FISH-SCHURMAN CORP. 72 Portman Road, New Rochelle, Ν. Y.
Fish-Schurman
Stirrer Speeds Your Work Sparkless, induction J^g H.P. motor with hollow armature secures stirrer shaft on lower end with screw chuck and on upper end with spring centering device. Glass, metal or plastic stirrers with shaft J42" to Jfe" c a n D e used. Support arm is 9" by Y2". No. 77677 "Hollow Spindle" Stirrer operates from 115 volt, 50-60 cy. A.C. Without propeller, $22.50. Stainless Steel Stirrers No. 77-837 have J4" shaft and 2" propeller. 12" length, $2.25; 18" $2.50; 24", $2.75. 1. Operator can vary working length of stirrer shaft by moving stirrer u p or down in hollow a r m a t u r e of motor. 2. No need to change stirrers for different size containers. 3. To place and remove containers, raise t h e stirrer only; leave motor stationary.
Eberbach
SCIENTIFIC INSTRUMENTS APPARATUS
CORPORATION
nnn ARBOR. miCH. 50 A
UtMUIMD i m
ANALYTICAL
CHEMISTRY
