NEW
PRODUCTS
equilibrium has been established a n d a special table is not required since vibra tion does n o t appreciably affect the reproducibility. P a n holders designed t o hold alumi num or platinum pans, capillary tubes, or suspended objects, a n d tare weights provide m a x i m u m versatility. T h e tor sion principle a t all bearing points eliminates knife edge friction. Static charges are dissipated b y gold-plating all the fused quartz material, including the p a n holders. T h e case is m a d e of 0.5-inch a l u m i n u m plate, which provides high h e a t capacity a n d rapid thermal equilibrium. 12
FLEXIBLE
MLGON PLASTIC TUBING
your own tests will
p r o v e its
superiority!
TEST i t for soft flexibility; clear, wate white transparency; unusual chemical resi ance; remarkable resistance to yellowin with age . . . for every use requiring a soft flexible, superior tubing with dimen sional stability.
C O M p t « € t Y NEW
write 3 ft.
for sample
Microdistillation Column
T h e Distillograph, operating on the principle of gas-liquid partition and designed for rapid, accurate separation of volatile compounds, is manufactured by the Research E q u i p m e n t Corp. Resolution of mixtures is b o t h qualita tive and q u a n t i t a t i v e , in samples ranging from 2 to 200 m a .
SUCH TESTS are proving, every day, that new, water-white Nalgon is truly an outstanding tubing . . . for Nalgon is formulated from the highest grade polyvinyl chloride and the latest plasticizers to make it a superior tubing. CHECK THE PRICE, too! Nalgon Tubing is amazingly economical! Ask your favorite Laboratory Supply Dealer for Complete details.
The
NALGE CΟ., Inc. ROCHESTER 2, N E W YOR For further information, circle number 63 A-1 on Readers' service Card, page 33 A
mms T h e i n s t r u m e n t , said to o u t m o d e conventional types of microdistillation columns, separates components in min utes and charts the information on an automatic recorder, f i x t u r e s of vola tile samples, formerly impossible to separate, m a y be completely resolved without the formation of azeotropes. Fractions boiling as lo\v as 20° C. or as high as 350° C. can be quantitatively separated and collected. T h e volatile materials are separated by a, helium gas stream flowing through a specially packed column of Celite wet with a high boiling point oil. As each separated component leaves the column, it passes through a highly sensitive thermal conductivity cell, which relays voltage differences to an electronic strip chart recorder. T h e d a t a are presented as a plot of thermal conductivity versus time. T h e a m o u n t and boiling point of
OHAUS GREATER SENSITIVE New lightweight beam inherently i EASIER, FASTER READING G r a d u a t e d end r e a d i n g d i a i speeds upweighing. REDUCED SHIPPING COSTS New corrugated breakproof shipping container substantially r e d uces s h i p p i n g w e i g h t . W h e n o r d e r i n g , specify O H A U S . . . a c k n o w l e d g e d l e a d e r in t h e i r f i e l d s i n c e 1907
for complete information icr. for brochure
2 7 , N O . 9, S E P T E M B E R
OHAUS
SCALE
CORPORATION
lOSO COMMERCE AVE. UNION, NEW JERSEY For further information, circle number 63 A-2 on Readers' Service Card, page 53 A
For further information, see coupon on page 53 A VOLUME
HEAVY DUTY SOLUT
1955
63 A
