18 Λ V O L U M E 19, NO. 6

NEW MODEL

S T O R M E R V I S C O S I M E T E R With pulley arm attached to center spindle housing permitting use of falling weight

either directly in front or at right of instrument

Suitable for: Condensed Milk Corn, Canned Drilling Fluids Enamels Glues Gums, water soluble Lacquers Mayonnaise Oils Paints Paper Sizing Printing Pastes (textile) Sewage Sludge Silicates Starches Sugar Solutions Tars and Soft Pitches Tomato Pulp,

Paste and Sauce Varnishes, Etc., Etc.

7649. 7649-H.

VISCOSIMETER, STORMER. For determining viscosities by measurement of the time re­quired for a definite number of revolutions of a rotating cylinder — or other type rotor — immersed in the sample placed in the test cup, maintained at a desired temperature by means of a water or oil bath, and driven by a falling weight through a series of gears. A revolution counter is attached to the spindle of the rotating cylinder or other rotor.

In the new model, the pulley arm is attached to the center spindle housing, permitting use of the instrument either with the pulley arm fastened to the right of the instrument so that the weight falls alongside the end of the laboratory table, or with pulley arm fastened at the front of the instrument so that the weight falls in front of the table. In either position, the dial is directly in front of the operator for convenient reading.

Relative viscosity is obtained by dividing the time required for the cylinder to make a specified number of revolutions in the material under examination by the time required for the cylinder to make the same number of revolutions in distilled water, or other reference, using the identical procedure, at the same temperature, and with the same operating weight.

Viscosities can be determined and recorded in the absolute unit, i.e. the centipoise, by means of a calibration table easily prepared by the user. The Stormer Viscosimeter is well adapted for such use as its readings are independent of the specific gravity of the fluid. See "Chemical Engineers' Handbook," John H. Perry, Editor, 2nd ed. (New York, 1941), p. 1535.

General Purpose Outfit. With cylindrical rotor and test cup provided with two side vanes, central baffle and ther­mometer holder. Weight box is filled with lead shot and weighs approximately 153 grams ; weight empty is approx. 28 grams so that the operating weight can be adjusted within these limits by adding to or removing shot from the box.

Paint Testing Outfit. With submerged paddle type rotor and set of slotted weights. A standard one-pint can is used as container, supported on a movable shelf, and replaces the test cup. As suggested and used by Krebs Pigment and Color Corporation for testing paint consistency and as adopted by A.S.T.M. for Standard Method D-562 for determining the consistency of exterior house paints and enamel type paints. 7649. Viscosimeter, Stormer, General Purpose Outfit, as above described, with cylindrical rotor and test cup provided with two side varies,

central baffle and thermometer holder; in case with thermometer and directions for use 155.00 7649-H. Viscosimeter, Stormer, Paint Testing Outfit, as above described, with submerged paddle type rotor, thermometer, plate to hold the

can of paint, and set of slotted weights 25 grams to 1 kilo, complete in case, with Krebs consistency chart 160.00 7649-K. Ditto, but calibrated by Krebs standard method 165.00

Copy of pamphlet EE-96, giving more detailed description, sent upon request.

ARTHUR H. THOMAS COMPANY RETAIL — WHOLESALE — EXPORT

LABORATORY APPARATUS AND REAGENTS WEST WASHINGTON SQUARE, PHILADELPHIA 5, PA., U .S .A .

Cable Address "Balance," Philadelphia