CLOSELY
CONTROLLED
HEATING
. . . with fast-heating, versatile TEMCO Hot Plates for boiling, evaporations, etc.
Here's the Hot Plate that processes your work precisely) Completely variable regulation of temperature between 60° and 4 5 5 ° C. (140° to 850° F.). Built-in controls hold temperature to extremely close limits, without variations due to line voltage changes. Economical to operate . . . current is " o n " only half of the time to hold 260° C. (500° F.). Scientifically designed throughout to meet strict functional requirements. Two sizes: 1 2 " χ 12", 1300 Watts, and 12" χ 24", 2600 Watts . . . both 7" high. $65 and $85. Write for literature and name of nearest dealer.
HMDtt HOT PLATES THERMO ELECTRIC MFG. CO. 471 HUFF ST., DUBUQUE, IOWA For further information, circle number 40 A-1 on Readers' Service Card, page 35 A
For Your LABORATORY α comp/efe Une of
GLASSWORKING EQUIPMENT Write today
fr
for * * * * *
Catalog C-54
A Bethlehem
Seal-Crib
Bethlehem Lab-Lathe Bethlehem Seal-Crib Lathe Burners Blast Burners Hand Torches Glassworking Tools Wet-Cut (Glass Cut-off Machine)
•^Wer-Cut G/ass Cut-off Machine
BETHLEHEM Apparatus Company, Inc. HELLERTOWN,
PENNSYLVANIA
For further information, circle number 40 A-2 on Readers' Service Card, page 55 A
40 A
PRE-TEST Your Production Blending In The Lab Unique design of p i t t w i n shell blenders allows exact scale-up of lab tests to production runs Here's the one piece of blending equip ment that has everything : a mixing action that blends most materials perfectly in 3 to 5 minutes . . . large access openings and smooth baffle-free interiors for fast and easy charging, discharging and clean ing . . . interchangeable shells and acces sories that give exceptional versatility . . . and . . . a unique, patented design that provides identical mixing results in all sizes, from one pint lab models up to 500 cu. ft. production units. |»J< twin shell lab blenders are used for small production runs as well as research in hundreds of plants. Priced low and available from stock. Dust-tight, corrosion and abrasion-resistant Lucite shells are standard. Also available in stainless steel. L i g h t w e i g h t cast a l u m i n u m b a s e h a s sturdy grey crackle finish, adjusts for 4 and 8 quart shells and yokes. G.E. motor is 1/20 H P , single phase, 115 volts, 60 cycle, AC. Chain guard furnished. Yoke Model holds two 1-quart or 1pint shells, or one of each, or one 2-quart shell with either, or a d a p t s into a standard 4 or 8 quart blender. Handles two jobs at once.
Intensifier Bar Model gives particularly in tense local mixing action, breaking up lumps, dispersing liq uids into solid mixes.
Write for |»-k catalog 13. The Patterson-Kelley Co., Inc., 2 4 1 0 Lackawanna Avenue, East Stroudsburg, Pa.
PATTERSON-KELLEY Offices: New York, Chicago, Philadelphia, Boston and other principal cities Circle No. 40A-3 on Readers' Service Card, page 55 A
ANALYTICAL
CHEMISTRY
