a new source for custom made
LecoZIRCONIA (Zr02)
ceramic ware
for temperatures to 4 6 0 0 ° F possesses one of the highest melting points of all commercial refractories
extreme chemical inertness won't erode when melting steel or high temperature alloys . .. won't react when firing titanate or sintering metals . . . won't embrittle platinum
excellent heat insulator the ideal material for high-temperature furnace linings and burner blocks
Typical applications for Leco zirconia ware include crucibles for melting special alloys, tubes for high temperature combustion or gas synthesis processes, heat-treating and sintering furnaces, and kiln furniture. We will be happy to engineer other applications to your individual requirements. Leco ALSO specializes in Zircon ( Z r S i 0 4 ) porcelains..«a few typical products are
Combustion Tubes for Carbon and Sulfur Analyses
Calculation of Transfers Needed in Countercurrent Distribution Eino Nelson Direct Titration of Oxirane O x y s e n with Hydrogen Bromide in Acetic A c i d . . A . J . Durbetaki Some Components of Gas Phase of Cigarette Smoke R.J. Philippe and M . E. Hobbs Determination o f - O x y g e n in Titanium, Zirconium, Chromium, Vanadium, and Steels by Bromination-Carbon Reduction Method Maurice Codell and George N o r w i t z Determination of Potassium as Metaperiodate R. E. Jentoft and R. J . Robinson Coprecipitation of Rare Earth lodates with Thorium lodate Precipitated from Homogeneous Solution K. J . Shaver Determination of Zirconium and / or Hafnium Using 1-Naphthylglycolic A c i d . . R. B. Hahn and P. T. Joseph Corrections CRYSTALLOGRAPHY DATA Thorium Tetranitrate Pentahydrate, T h ( N 0 3 ) 4 . 5 H 2 0 Eugene Staritzky Plutonium Tetranitrate Pentahydrate, P u ( N O n ) 4 . 5 H 2 0 Eugene Staritzky Cerium Tetranitrate Pentahydrate, C e ( N 0 3 ) 4 . 5 H 2 0 Eugene Staritzky yttrium Sesquioxide, YO , Dysprosium Sesquioxide, D y . O . , Erbium Sesquioxide, Er 2 Os, Ytterbium Sesquioxide y b 2 0 3 Eugene Staritzky SCIENTIFIC C O M M U N I C A T I O N Precision Plating of Polonium Isaac Feldman and Margaret Frisch
1998 2000 2002
2006 2011
201 5 2019 2028 2021 2021 2022
2023
2024
M E E T I N G REPORTS Society for Analytical Chemistry American O i l Chemists' Society
2025 2026
A I D S FOR THE A N A L Y S T Liquid-Liquid Continuous Extractor for Solvents Heavier Than Water C. E. Pierce and R. E. Peterson Thermistor-Operated Temperature Control C. M . Proctor Power Supply for Zone Electrophoresis, Electrodialysis, and General Use. C. M . Proctor Analysis of Pickling Bath Solution Using Ion Exchange Florence Nesh and E. C. Haas Buret Pump for Handling Two-Phase Liquids in Quantitative Analysis W . R. Dunnavant Micro Test Tube Marker S. L. Bonting and G . R. Walters Plastic Vessel for p H Measurements of Small Samples K. M . Richter Ultraviolet Scanner-Camera for Paper Chromatography N . A . Drake, W . J. Haines, R. E. Knauff, and E. D. Nielson Tray for Dipping Chromatograms N . J. Morris and A . C. F. Mason A U T H O R INDEX SUBJECT I N D E X G U I D E FOR A U T H O R S
2029 2030 . . .
2032 2034 2034 2035 2036 2036 2038 2041 2051 2066
G U I D E FOR A U T H O R S , published in December 1956 issue, page 2066, gives copy requirements w h i c h should be observed in preparing manuscripts for editorial consideration. M a n u s c r i p t (2 copies) should be submitted t o the Editorial Director, 1155 Sixteenth St., N . W . , W a s h i n g t o n 6, D . C. T h e American Chemical Society assumes no responsibility for t h e statements and opinions advanced by contributors t o its p u b l i c a t i o n s . V i e w s expressed in t h e editorials arc t h o s e o f t h e editors and d o n o t necessarily represent t h e official position of t h e American Chemical Society. Published m o n t h l y by t h e American Chemical Society, from 20th and N o r t h a m p t o n Sts., E a s t o n , Pa. Executive Offices, E d i t o r i a l H e a d q u a r t e r s , and Circulation D e p a r t m e n t , 1155 Sixteenth St., N . W . , W a s h i n g t o n 6, D. C. Advertising Office: 430 Park A v e . , N e w Y o r k 2 2 , N . Y . Branch Editorial Offices: 86 East R a n d o l p h St., Chicago 1, 111.; 718 Melrose Bldg., Houston 2, Tex.; 2 P a r k A v e . , N e w Y o r k 16, N . Y . ; 703 M e c h a n i c s ' I n s t i t u t e B l d g . , San Francisco 4, Calif.; Bush House, A l d w y c h , L o n d o n . Entered as second-class m a t t e r at the Post Office at E a s t o n , P a . , U . S . A . , February 1 8 , 1 9 4 8 , under the Act of M a r c h 3 , 1879. 1956 Subscription Rates M e m b e r s , foreign and domestic N o n m e m b e r s , domestic and Canada N o n m e m b e r s , foreign except Canada
Stock Tubes for Furnace Cores and other uses
Write
Today for Complete
Literature!
LABORATORY EQUIPMENT CORP. St. Joseph 8, M i c h i g a n Circle No. 6 A on Readers' Service Card, page 63 A.
l1y vr. r. $ 4.00 5.00 15.00
2yr. S 7.00 9.00 27.50
3yr. $10.00 12.00 40.00
Postage to countries n o t in the Pan-American Union $1.50 yearly. Canadian postage $0.50 yearly. Single copies: c u r r e n t issues, $1.50 ( A p r i l , issued in t w o p a r t s , priced a t $ 2 . 0 0 ) . Claims for missing numbers will not be allowed if received more t h a n 60 days from date of mailing plus t i m e normally required for postal delivery of journal and claim. NO claims allowed from subscribers in Central Europe, Asia, or the Pacific Islands o t h e r t h a n H a w a i i or, because of failure t o notify the Circulation Department of a change of a d d r e s s , o r because copy is " m i s s i n g from files." C H A N G E O F ADDRESS: N o t i f y Circulation D e p a r t m e n t , American Chemical Society, 1155 Sixteenth St., N . W . , W a s h i n g ton 6 , D . C. Such notification should include b o t h old and n e w address and postal zone number, if any. The American Chemical Society also publishes: Industrial and Engineering Chemistry, Chemical and Engineering News, Chemical Abstracts Service, Journal of the Americar Chemical Society, The Journal of Physical Chemistry, Journal of Agricultural and Food Chemistry, and The Journal (.f Organic Chemistry. Rates on request.
ANALYTICAL
6A For further information, circle number S A on Readers' Service Card, page 63 A
CHEMISTRY
