7ÂomOà— H o o v e r CAPILLARY MELTING POINT

APPARATUS with

PERISCOPIC THERMOMETER READER

• With bath unit enclosed for safety

• Log/ess heat transfer for rapid heating and cooling

• Built-in capillary vibrator for uniform packing of sample

For fast reproducible determinations of melting points conforming to official U.S.P. and similar methods using glass capillary tubes. Electrically heated, range from room temperature to 350°C. Takes up to five samples simultaneously.

Consisting of illuminated, silicone fluid bath with electric stirrer, heater controlled by auto-transformer, built-in capillary vibrator, ar­mored thermometer, etc., combined in a single sturdy unit. 6406-K. Complete with Periscopic Reader

P E R I S C O P I C T H E R M O M E T E R R E A D E R

Provides magnified thermometer indication in window adjacent to capillary magnifier, for ease in observation of both bath temperature and melting sample. Upper mirror assembly of periscope is raised or lowered to follow mercury level of thermometer by turning knob at side of reader housing.

Safety—Bath enclosed except for observation port. Removal of bath disconnects heater and stirrer.

Rapid heating and cooling — Lightweight, Ni-chrome wire heater, 500-watts, responds rap­idly to changes in input voltage, providing rapid lagless heat.

Capillary Vibrator—Insures uniform packing of sample in capillaries.

A 100 ml beaker of borosilicate glass is used as the melting point bath. Bath is protected from dust and air currents. Bath oil is circulated by an electrically driven stirrer controlled from panel. For ease in changing the bath liquid, bath assembly can be lifted out of the cabinet.

Showing enlarged field of view with Periscopic Reader

6 4 0 6 - K . Capi l lary Mel t ing Point Appara tus , Thomas-Hoover " U n i - M e l t " , complete with Peri­scopic Thermometer Reader, thermometer, melting point standards, Silicone Fluid, capil laries, and 6 f t . 3-wire connecting cord. For 1 15 volts, 60 eye, a . c . . 2 0 7 . 5 0 6 4 0 7 - A . Periscopic R e a d e r , only, with mounting bracket and screws for convenient attachment to cabinet of instruments not furnished with Reader. . . . 3 7 . 5 0

ARTHUR H. THOMAS COMPANY More and more laboratories rely on Thomas Laboratory Apparatus and Reagents

I L A D E L P H I A S . P A .

as 1 Laboratory Appara

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Circle No. 85 on Readers' Service Card

7 0 A · ANALYTICAL CHEMISTRY