22 A A N A L Y T I C A L C H E M I S T R Y

A.H.T. CO. SPECIFICATION

JET T Y P E W A T E R C IRCULATOR WITH AUTOMATIC WATER LEVEL REGULATOR

WATER CIRCULATORS, JET TYPE, with automatic water level regulator, A.H.T. Co. Specification. For effective cooling of contents of beakers, small jars, etc., partly submerged in a small, open-top bath when attached to a suit­able head of tap water; also excellent for main­tenance of constant temperature in small baths ; when used in conjunction with suitable liquid circulating pump and a supply of heated water or other non-viscous bath liquid. The small size fits the water bath of the Stormer Viscosimeter and the heating trough of the Bausch & Lomb Dipping Refractomcter. Both sizes will function with activating pressures as low as 2 lbs. per square inch.

Consisting essentially of a narrow, modified " U " made of nickel plated brass with diverging connecting tubes and a small opening close to the bottom to emit a fine stream which, in use, creates positive agitation of the circulating liquid in the bath. The outlet side has an opening which determines the liquid level, and contains an ejector-type aspirating nozzle which creates

powerful jet pump action, and prevents overflow of open-top baths. The Small size has connecting tubes %6-inch diameter, and spring clip for attachment to vessels with wall thickness

up to %2-inch. The Large size has connecting tubes J^6-inch diameter, adjustable clip for attachment to top of jars, etc., also a post, 1-inch high, above the connecting tubes, with horizontal hole and thumbscrew for attachment to J^-inch rods on external supports. Triangular Spiral Spring Support 9364 is a useful accessory for assembling an inexpensive "beaker cooler" in the laboratory. 9937. Water Circulators, Jet Type, with automatic water level regulator, A.H.T. Co. Specification, as above described, complete with directions

for use. Size Small Large Height overall, inches 3 8 Immersion depth, maximum, inches 2ti 6 Liquid level depth, minimum, inches 1% 4

9937. Fig. 1, showing Small size in position in Water Bath of Stormer Visco­

simeter.

9937. Fig. 2, showing Large size in posi­

tion in a beaker.

Each. 7.1S 8.25

TRIANGULAR SUPPORT, Spiral Spring Type. As suggested by Richard D. Fine, Atlas Powder Company, Wilmington, Del. Of Stainless steel, for convenient suspension of test tubes, beakers, etc., up to 5 inches diameter, in open-top vessels when clipped to top of suitable containers such as jars, beakers, small baths, casseroles, crystallizing dishes, funnels, etc. Can be attached to tops of cylindrical containers from 3}^ to 7J^ inches diameter, with wall thickness up to JH^-inch. Consisting of three spiral springs 2 inches long X i^-inch diameter, with loop ends, attached to three Stainless steel spring clips, J^-inch wide X 1 inch long, to form a triangle, and three forked Spring Inserts for attachment between coils of the spiral springs to permit adjustment of spring tension and insertion of objects of smaller diameter. Useful

for making simple "beaker coolers," temperature conditioning baths, and for cooling or heating of precipitates and solutions when used with 9937 Water Circulator. 9364. Triangular Support, Spiral Spring Type, of Stainless steel, as above described, complete with three spring inserts 3.78 3259. Thermometer Holder, of Stainless steel, with spring clip, for attachment to rim of glass beakers, jars, etc. Immersion depth of ther­

mometer can be adjusted as required, and the Holder can be attached to vessels 43^ inches or more deep provided thickness of side walls does not exceed %-inch. Takes thermometers, tubes, etc., up to 7 mm diameter 88

9364. Fig. 1, showing beaker inserted

in a jar.

9364. Fig. 2, showing use of Forked Insert for use in supporting test tubes.

ν 3259.

Thermometer Holder.

ARTHUR H. THOMAS COMPANY RETAIL—WHOLESALE—EXPORT

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

Cable Address, "Balance," Philadelphia