hear "the development of an

At the Pittsburgh Conference — Hear "The Development of an Atomic Absorption Flame Photometer for Routine Measurements" Dr. J. A. Mitchell, Ph.D., MIEE, F. Inst. P. See the EEL 140 in the Fisher Scientific Co. exhibit — Booths 16 to 19 Atomic Absorption Spectrophotometer Lamp Conditioner The EEL Lamp Conditioner preheats up to four lamps simul- taneously, eliminating operational delays and provides a convenient means of running lamps to preserve their emission during long periods of disuse. The correct operating cur- rent for each lamp may be selected independently. Contact your nearest FISHER SCIENTIFIC or VAN WATERS a ROGERS sales office INTERNATIONAL SALES ASSOCIATES 115 East Maple Ave., Langhorne, Pa. (215) SK7-9874 See Buyers' Guide for all products/sales offices. Circle No. 257 on Readers' Service Card HARSHAW IR Pressed Pellet Powders KBr, Csl, and TIBr, IR Pressed Pellet Powders are suitable over a wide spectral and refractive index range. The Harshaw Chemical Co. 194S East 97th St. · Cleveland. Ohio 44106 · Phone 216 721-8300 Utrecht. Netherlands —Harshaw-Van Der Hoorn N.V. Frankfurt. W. Germany— Harshaw Chemie GmbH Circle No. 254 on Readers' Service Card tote*... VITREOSIL PURE FUSED QUARTZ CONICAL PIPE JOINTS Designed as a practical demountable joint for vacuum or pressure, liquid or gaseous systems. The conical (or Buttress) joint is available in clear pure fused quartz in sizes to 2" I.D. and in opaque fused silica in sizes 3" I.D. to 6" I.D. Clear fused quartz joints have grooves into which gasket material is forced for tighter joints. Opaque fused silica joints have precisely ground flat ungrooved surfaces. Gas- keting material may be selected to meet requirements. Conical pipe joints are ideal for joining fused quartz or fused quartz to metal, ceramics, plastics, etc. Interchangeable with borosili- cate pipe joints. Joint hardware can be supplied at additional cost. Special auxiliary apparatus with furnace annealed pipe joints includes thermocouple wells, end caps, closed and/or reduced end furnace tubes in various sizes, one, two and three neck round bottom flasks up to 2 liters capacity in clear pure fused quartz and up to 15 liters in opaque fused silica. 38 THERMAL AMERICAN FUSED QUARTZ CO. RT. 202 S CHANGE BRIDGE RO. MONTVILLE, NEW JERSEY ZIP CODE 07045 Circle No. 35 on Readers' Service Card 2 2 0 A · ANALYTICAL CHEMISTRY VITREOSIL

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At the Pittsburgh Conference —

Hear "The Development of an Atomic Absorption

Flame Photometer for Routine Measurements"

Dr. J. A. Mitchell, Ph.D., MIEE, F. Inst. P.

See the EEL 140 in the Fisher Scientific Co.

exhibit — Booths 16 to 19

Atomic Absorption Spectrophotometer

Lamp Conditioner

The EEL Lamp Conditioner preheats up to four lamps simul

taneously, eliminating operat ional delays and provides a

convenient means of running lamps to preserve their emission

during long periods of disuse. The correct operat ing cur

rent for each lamp may be selected independently.

Contact your nearest FISHER SCIENTIFIC or VAN WATERS a ROGERS sales office

INTERNATIONAL SALES ASSOCIATES 115 East Maple Ave. , Langhorne, Pa. (215) SK7-9874

See Buyers' Guide for all products/sales offices. Circle No. 257 on Readers' Service Card

HARSHAW

IR Pressed Pellet

Powders

KBr, Csl, and TIBr, IR Pressed Pellet Powders are suitable over a wide spectral and refractive index range.

The Harshaw Chemical Co. 194S East 97th St. · Cleveland. Ohio 44106 · Phone 216 721-8300 Utrecht. Netherlands —Harshaw-Van Der Hoorn N.V. Frankfurt. W. Germany— Harshaw Chemie GmbH

Circle No. 254 on Readers' Service Card

tote*... VITREOSIL PURE FUSED QUARTZ

CONICAL PIPE JOINTS

Designed as a practical demountable joint for vacuum or pressure, liquid or gaseous systems. The conical (or Buttress) joint is available in clear pure fused quartz in sizes to 2" I.D. and in opaque fused silica in sizes 3" I.D. to 6" I.D.

Clear fused quartz joints have grooves into which gasket material is forced for tighter joints. Opaque fused silica joints have precisely ground flat ungrooved surfaces. Gas-keting material may be selected to meet requirements.

Conical pipe joints are ideal for joining fused quartz or fused quartz to metal, ceramics, plastics, etc. Interchangeable with borosili-cate pipe joints. Joint hardware can be supplied at additional cost.

Special auxiliary apparatus with furnace annealed pipe joints includes thermocouple wells, end caps, closed and/or reduced end furnace tubes in various sizes, one, two and three neck round bottom flasks up to 2 liters capacity in clear pure fused quartz and up to 15 liters in opaque fused silica. 38

THERMAL AMERICAN FUSED QUARTZ CO.

RT. 202 S CHANGE BRIDGE RO. MONTVILLE, NEW JERSEY

ZIP CODE 07045

Circle No. 35 on Readers' Service Card

2 2 0 A · ANALYTICAL CHEMISTRY

VITREOSIL

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