PIPE oit TUBE?
PARR
We have o b s e r v e d a great t r e n d t o w a r d the use of t u b i n g in m a k i n g up s m a l l f l u i d c o n t r o l systems these d a y s . T o help y o u keep up w i t h t h e t r e n d we have a d d e d a great g r o u p of H o k e valves w i t h integral G y r o l o k t u b e c o n n e c t i o n s to our a l r e a d y o v e r - e x t e n d e d line. A s a matter of fact, we have a s p e c i a l c a t a l o g w a i t i n g just for y o u .
HOKE INCORPORATED 1 Tenakill Park, Cresskill, N . J .
HOKE
For c a t a l y t i c with
U n b r e a k a b l e I n g e n i o u s d e s i g n and p o l y p r o p y l e n e plastic make t h e s e fine Lang-Levy pipets virtually u n b r e a k a b l e in normal use. T h e y c a n be used w i t h o r g a n i c and i n o r g a n i c solvents, c l e a n e d w i t h regular l a b o r a t o r y d e t e r g e n t s and a u t o c l a v e d . They can be d r o p p e d , t h r o w n or t o s s e d w i t h o u t fear of b r e a k a g e . Accurate These " l i f e t i m e " Lang-Levy p i p e t s are m o r e ac c u r a t e t h a n most glass m i c r o - c o n s t r i c t i o n p i p e t s now on the market. Small sizes, 1 - 5 jul, are c a l i b r a t e d to deliver their listed v o l u m e s w i t h i n ± 0.1 juI, larger sizes w i t h i n ± 1.0%. A l l c o m m o n l y used sizes are available f r o m s t o c k . Full d e t a i l s , i n c l u d i n g p r i c i n g , are in P r i c e List M P - 1 . Dept. A-5
Bic-Rad Laboratories, 32 & Griffin Avenues, Richmond, Calif. 94804 Gentlemen: Please send my free copy of Price List MP-1 which in cludes full details as well as prices. TITLE
reactions
2 5 0 o r 5 0 0 m l . glass b o t t l e s . A l s o available u n i t w i t h interchangeable W r i t e o r phone
1 and 2 liter
( 3 0 9 ) 762-7716
in
i n a larger
bottles.
f o r the latest
issue o f
Spec. 3 9 0 0 d e s c r i b i n g the recently i m p r o v e d models o f this w i d e l y used h y d r o g e n a t o r .
PARR INSTRUMENT COMPANY 211
F i f t y - T h i r d St.
M o l i n e , Illinois
61265
Circle No. 78 on Readers' Service Card
New From Bio-Rad "Lifetime" Lang-Levy Pipets of Polypropylene
NAME
r e d u c t i o n , condensation a n d o t h e r
hydrogen at pressures u p t o 5 a t m . ( 6 0 psig.)
Circle No. 8 on Readers' Service Card See ACS Laboratory Guide for All Products/Sales Office
BIO-RAD Laboratories
HYDROGENATION APPARATUS
QUALITY ITEMS FROM Ν Y L A B ! Poiy " P O L I C E R O D S " with . « , i m p r o v e d Scraper Edge. One piece molded, flexible, chemically inert polyethylene rods ere unbreakable BUT can be bent easily to any angle required. Thin paddle ends may be trimmed with scissors. Use able for short periods at tempera tures up to 100c. Wire stiffened.
Approx. Catalog Overall Price length Dz. No. 6 in. $6.00 77520 7.20 9 in. 77523 Discount of 1 0 % on gross lob. Mir Order—$10.00
W E I G H I N G FUNNEL for speedy, precise w e i g h i n g w i t h N O loss i n transfers Place material to be weighed in covered-front and/or open-rear sections. Complete transfers easy-rinse material directly through funnel tip into receiver. Stable, flat base, lightweight. DIAM PRICE CATALOG LENGTH NO. (mm) (dz.) (mm) 12803 40 $12.00 15 12804 25 65 15.00 12805 38 100 20.00 Orders must be in do cen lots ol one size. 1 0 % discount on orders of 6 dz. of seme or assorted sizes. WRITE FOR COMPLETE D A T A .
ORGANIZATION ÎMâttt 1
ADDRESS CITY
STATE Circle No. 118 on Readers' Service Card
152 A
·
ANALYTICAL CHEMISTRY
IriMSWI
N E W YORK
LABORATORY
SUPPLY
CO., I N C .
7 6 V A R I C K S T R E E T · N E W Y O R K , Ν . Υ. 1 0 0 1 3
Circle No. 158 on Readers' Service Card
