leading apparatus f o r c o m b u s t i o n
carbon and sulfur analysis Leco combustion analysis equipment...proved best in thousands of installations for analyzing carbon and sulfur in iron, steel, oil, coal, coke, limestone, rubber, catalyst, soil and many other materials. Specify Leco analysis apparatus for your laboratory.
DETERMINATORS
Conductometrïc Carbon. Shows carbon to 4th decimal in 5-10 minutes in Alnico, transformer sheet, titanium, many others.
Gasometric Carbon. Four versatile models for carbon or alloy steel, cast iron, carbides and many other materials.
Oxygen Purifying Train. Flow meter and needle control valve. For bench or wall mounting.
Carbon Determinator measures carbon in cracking catalyst. Activity, selectivity test units available.
At left—Model 518 semi-automatic
SULFUR TITRATORS Model 518 semi-automatic. Titrating stopcocks replaced by push buttons. For improved accuracy, operator titrates to meter reading rather than matching color by eye.
At right—Model 532 automatic
Product Capsules Colorimeters. Literature available on company's " L u m e t r o n " colorimeter for Nessler tubes. A new photoelectric ins t r u m e n t for t h e measurement of pale colors and faint turbidities. Photovolt Corp., 95 Madison Ave., Ν . Υ. 16, Ν . Υ.
31A-3 Crucibles, Porcelain. Coors porous b o t t o m porcelain crucibles are cited a s being acid washed a n d individually tested. Fired-in disk will n o t crack on ignition. Coors Porcelain Co., Golden, Colo. 66A-2 D e n s i t o m e t e r s . Bulletin available on company's photoelectric i n s t r u m e n t for t h e rapid and convenient evaluation of strips a n d sheets of filter paper in par tition chromatography a n d paper elec trophoresis. Photovolt Corp., 95 M a d i son Ave., N . Y. 16, N . Y. 31A-2 Distillation A p p a r a t u s . Suitable for b a t c h or continuous operation, " R o t o v a p " is completely automatic and pro vides safe, rapid and efficient evapora tion of either dilute or concentrated solu tions, company states. Distills 100 ml. of aqueous solution a t 55° C in 10 to 15 minutes. Folder available. E . M a c h lett & Son, 220 E a s t 23rd St., Ν . Υ. 10, N . Y. 87A-1 Distilled Water Equipment. Bulletin available describing c o m p a n y ' s t i n lined piping, fitting, valves and faucets for distilled water distribution systen s. Barnstead Still & Demineralizer Co., 9 Lanesville Terrace, Boston 31. Mass.
Model 532 automatic model frees operator completely during titrating process by arriving at the end point automatically.
FURNACES
62 A-1
Induction Furnace at left in three models. Burns steel, oil and many other materials for combustion carbon and sulfur analysis.
Resistance Furnace at left in two outstanding models. Built for temperatures up to 3000° F. Contains long-lasting heating element.
I ACCESSORIES Copper, t i n and iron chip a c c e l erators for speeding c o m b u s t i o n analyses.
Solid sulfur gas absorbent which replaces liquid absorbent in combustion train.
Leco's special copper oxide catalyst to quickly convert CO to CO2.
Distilling H e a d s . Circle 42A for Ace catalog " 5 0 " showing complete listing of distilling heads, columns, receivers and components. Ace Glass Inc., Vineland. X J. 42A Electrodes, S p e c t r o g r a p h s . Circle indicated n u m b e r s for information and samples of t h e following graphite elec trodes: t y p e 1909 platrode (a n o n porous graphite electrode using t h e " r o t a t i n g platform technique"), f6A-1 ; t y p e 1994 porous cup electrode, I6A-2; and t y p e 4925 solution electrode (with small radius-formed depression on top). 16A-3. United Carbon P r o d u c t s Co., Inc., P . O. Box 269, B a v Citv, Mich.
16A-1,2,3 Combustion Tubes for resistance furnaces.
Boat Puller of heat-resistant alloy, with colored eye shield.
t^r Leco Oxygen Baffles and Dust Traps. Combustion Boats in many sizes.
MMMMWitMaMMhN LABORATORY
mtimmmmmmm
EQUIPMENT
CORP.
3002 H i l l t o p R o a d , S t . J o s e p h , M i c h i g a n
Send for
FREE CATALOG!
For further information, circle number 80 A on Readers' service Card, page 91 A
80 A
·
ANALYTICAL CHEMISTRY
Electrophoresis-Diffusion Instru ments. Circle 10A-1 for complete in formation on i n s t r u m e n t cited as having multiple optical systems arranged for rapid and efficient use, a n o p t i m u m of a u t o m a t i c controls, a n d a single-unit construction. Also available i s com plete information on c o m p a n y ' s ultracentrifuges (circle I0A-2). Spinco Div., Beckman I n s t r u m e n t s , Inc., Belmont 7, Calif. 10A-1,2 (Continued on page 82 A
