ANALYTICAL
42 A
CHEMISTRY
THELABORATORYSUPPLYC .J
SPECTROCHEMISTS!
NEW!
INEXPENSIVE!
TIME SAVING!
"Misco" Automatic Fraction Collector
If y o u w a n t to m e a s u r e . . • • Lines as narrow aa 15 or 20μ. • At rate of 5 or more a minute. • With an accuracy of 1% at densities of 1.0.
then specify THE JACO ComJpaÎà°torMlCROPHOTOMETER Write for
catalog
H10-51A
U
JARRELL-ASH COMPANY
Complete units with automatic mechanical timers, a large assortment of reels, and liquid dispenser are now available for your laboratory. Saves Time and Labor. Inquire today.
L^^ZT
Complete Spectrochemical Installations
4
OUTSTANDING ADVANTAGES
MICROCHEMICAL SPECIALTIES COMPANY 1834 N. University Ave., Berkley 3, Calif.
Λ
MICRO S BEAKERS WRITE F O R LEAFLET
R. P. CARGILLE
I N THE N E W
^ Λ / ^ W CENTRIFUGE 1 2 3 4
COMPACT—Bowl, motor, rheostat, tacho meter and timer a r e enclosed in cabinet CONVENIENCE—All controls and indicators mounted on a single recessed panel in front BEAUTY—Handsome floor model cabinet has distinguished appearance ECONOMY—Moderately priced. Quality b u i l t . . . requires minimum of maintenance Available in 2 sizes Write Dept. A for illustrated folder
PHILLIPS-DRUCKER ST.
MB-AC
Write for descriptive literature New York 6, N. y.
J
LABORATORY SERVICES * V i t a m i n assays * M i n e r a l determinations including fluorine a n d other trace elements of nutritional importance * Evaluation of unknown compounds for insecticidal, f u n g i c i d a l , a n d bactericidal properties * P h e n o l coefficient determinations * Food bacteriology * Fat a n d o i l constants * Spectrophotometric analyses Write for details
WISCONSIN ALUMNI RESEARCH FOUNDATION P. O . Box 2059
For The Chemist a n d
Engineer
Sturdy: Low Priced: Weight 12 lbs. Easy to Learn: New Back Transfer Device Speeds Up Calculations Ask For B u l l e t i n BQ-123 SOLE DISTRIBUTORS
FOR U . S . A .
I V A N SORVALL, INC 210
FIFTH A V E . , N E W YORK 1 0 , Ν . Υ .
Want more basic facts on the Process Industries and the magazines which serve
the field most
Madison 1 , Wisconsin
LABORATORY SUPPLY CENTER • advertising
rate»
M a x i m u m space — 4 " per D i r e c t o r y
^ΝΑΝΟΥ CALCULATOR^
Southwestern Analytical Chemicals 1107 W. Gibson St. Austin 4, Texas
effectively? Send for our
LOUIS, M O .
ORIGINAL-O DHNËf?^
POLAROGRAPHIC REAGENTS Quaternary Ammonium Hydroxides and Iodides Purified for Polarography
Data Sheet file. It will give you all pertinent data on markets, circula
per p u b l i c a t i o n issue
Inches used within one year
Rate per inch
96 48 24 12 1
$8.25 8.50 8.75 9.00 10.00
Total Directory inches per year are based on Direc tory space used in all ACS publications. Agency commission: 1 5 % . 2% — 10 days, net 30 days.
Cash discount,
ANALYTICAL CHEMISTRY Advertising
Department
332 W. 42nd St., New York 18, Ν. Υ.
tion, rates, readership, etc.
Write t o : Promo
tion Department, Reinhold
Publishing
Cor
poration, 330 West 42nd Street, New York 18, Ν. Υ.
