DELMAR'S GREASELESS HI-VACUUM GLASSWARE
News
Analytical Chemistry Index for 1 9 6 4 - 1 9 6 8 ANALYTICAL CHEMISTRY is pleased
to announce the publication of a new 5-year collective index covering the years 1964-1968, which will be available before midyear 1969. Other collective indexes available from ANALYTICAL CHEMISTRY are: two 15-year indexes covering the years 19291958 and one 5-year index covering the years 1959-1963.
Handiest O-Ring Joint available
Greaseless Stopcock
The unique Delmar O-Ring Joint has three pressure ridges. These multiple pressure points within the O-Ring joint provide truly positive seals at pressures down to 10-6mm and at temperatures from - 4 0 ° F to 500°F.
A new grease free stopcock for pressures down to 10-6mm. Usable in the temperature range from —40° to +500°F. Available in sizes from 0 to 4mm and 0 to 10mm.
Ask for Catalog A-60. Write t o Coleman Instruments Division of The Perkin-Elmer Corporation, 42 Madison Street, Maywood, Illinois 60153. VISIT OUR BOOTH— F.A.S.E.B. MEETING
PERKIN-ELMER
Circle No. 32 on Readers' Service Card
micromeritics MERCURY PENETRATION POROSIMETERS c h a r a c t e r i z e pore volume, size, shape · porosity bulk, absolute density · surface area · particle size
As in the past, the new 5-year index is available to members of the ACS Analytical Chemistry Division at a pre-publication reduced rate. The price for nonmembers is $10; Division members may order the index at $6. Since membership dues in the Analytical Chemistry Division are S3 per year, joining the Division and ordering the 5year index through the Division results in considerable savings. All correspondence regarding membership in the Division and the special member rate for the new index should be sent to Dr. J. C. White, Analytical Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, Tenn. 37830. Dr. White requests that remittance for the index should be sent to him as soon as possible and prior to July 1, 1969. Regular subscribers to ANALYTICAL
MODEL 900 SERIES pore size range 177 to 0.0035 micron dia. determines internal pore structure and evidence of pore shape, pore size, volume and distribution in powdered and rigid samples / penetration volume up to 4 cc / accommodate samples up to 20 cc for greater accuracy / direct digital read-out of mercury penetration / no transfer or handling of sample during test / nine models; 1, 2 or 4 chambers in 10,000, 30,000 or 50,000 psi range / size, 27" W by 28" D by 68" H.
mi 46 A .
AND T E C H N I C A L
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AOAC Invites Nominations for 1 9 6 9 - 1 9 7 0 AOAC Scholarship
Write for complete descriptive literature, technical information and details on obtaining sample analysis of your material. INSTRUMENTS
CHEMISTRY
Analytical Division members may order the new and older indexes from: Special Issues Sales, American Chemical Society, 1155 Sixteenth St., N.W., "Washington, D. C. 20036.
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( m e t r o a t l a n t a ) p h o n e IAOA1 4 4 B - 8 2 B 2 Circle No. 54 on Readers' Service Card ANALYTICAL CHEMISTRY
Nominations for the fourth annual AOAC Scholarship Award are now invited by the Association of Official Analytical Chemists. The award, which honors Harvey W. Wiley, consists of S300 each for each of two years to an undergraduate college student majoring in a scientific area important to agriculture or public health. A nominee should have at least a " B " grade average, should be ready for the last two years of undergraduate study, and
