INTERNATIONAL CRYSTAL LABORATORIES

Follow the leaders to I.D.L.. Write for Cata- logs and price lists on. Crystals,. Sealed liquid cells. Long path cells, and. Cell reconditioning servi...
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INFRARED OPTICAL CRYSTALS and CELLS FAST CELL RECONDITIONING SERVICE

(36) H. Jedrzejewska, Ibid., 7, 27 (1962). (37) R. M. Organ, Ibid., p. 48. (38) A. J. Frisque, ANAL. C E I M . , 29, 1277

CUSTOM ROUTINE INFRARED ANALYTICAL SERVICE AVAILABLE

(1957). (39) M. Picon, S. Boucher, and J. Condamin, Gallia, 24, 189 (1966). (40) H. Neuninger and R. Pittioni, Archaeologia Austriaca, 31, 96 (1962). (41) M. Banks and Ε. Τ. Hall, Archae­ ometry, 6, 31 (1963).

Consistently High Quality, Prompt delivery, low prices . . . these are the benefits realized by many of the largest Ameri­ can and Canadian Universi­ ties and Companies in the Chemical and related in­ dustries who. have al­ ready established Inter­ national Crystal Labora­ tories as the prime source for sodium chloride, po­ tassium bromide, calcium fluoride and barium fluoride. Follow the leaders to I.C.L Write for Cata­ logs and price lists on Crystals, Sealed liquid cells, Long path cells, and Cell reconditioning service.

INTERNATIONAL CRYSTAL LABORATORIES 122 Coit Street, Irvington, New Jersey 07111 Phone (201) 373-4242 Circle No. 103 on Readers' Service Card

THE FOB SURE CURE PROCEDURE: 1. Take One Model T-9 T h e r m o s t a t i c Bath & Circulator 2. Mix w i t h one Vu hp PBC-4 Bath Cooler 3. Add a Model C-4 w e l d ­ ed a l u m i n u m cart

Now you can serve up fluid from —20°C to + 250°C. dT ±0.02°C with water based fluid; ±0.05°C with organic fluids. Small size and mobility mean one system can serve varied requirements. Work Area: &/z" dia. χ 8 " deep Pump Volume: 130 g a l / h r (0 head) Pump Head: 10 ft. max. B T U / h r 20°C: 1 5 0 0 + (net) Floor Space: 14V2" χ 2 1 % "

NESLAB Instruments, Inc. 871 Islington St., Portsmouth, N.H. 03801

Circle No. 1G7 on Readers' Service Card 42 A

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ANALYTICAL CHEMISTRY

Dr. A. E. A. Werner was born in Dub­ lin in 1 9 1 1 . He studied at Trinity College in Dublin, and later did re­ search under Professor H. Staudinger at the University of Freiburg in Breisgau. He taught chemistry at Dublin University until 1948, when he was appointed research chemist at the National Gallery. In 1955 he joined the Research Laboratory of the British Museum, and he is now Keeper of the Laboratory. Since 1962 he has been a Professor of Chemistry at the Royal Academy of Arts. He is a member of the Society of Antiquaries, the Museums Association, the Royal Institute of Chemistry, and the Royal Irish Academy. His continuing re­ search interests are with scientific methods in the examination and con­ servation of antiquities.