Viscosity directly in eentipoises... HOEPPLER VISCOSIMETER
AMF
FIBERFILM
A NEW Approach to Filtration
FILTERS
There is no other filter like it! Only A M F FIBERFILM filters combine superior speed, clarity and tensile strength in a single filter material.
PRECISION MODEL The Hoeppler Viscosimeter pro vides a fast, accurate method of de termining the viscosity of gases, liquids, oils, plastics, syrups, viscous tars and dark liquids. From 0 Q C. to 100°C. Direct readings in eenti poises (or centistokes). From 0.01 to 1,000,000 eentipoises. Accuracy 0 . 1 % t o 0 . 5 % . Small samples (30cc) required. Results consistent and reproducible. Price, $350. Interchangeable™spare parts available. Write for Bulletin HV-303.
on the principle of the suspended level A capillary-type viscosimeter for determining the kinematic viscosity of any true viscous liquid, such as petroleum products or lubricants. See American Society for Testing Materials, A.S.T.M. designation D 445-53T . Measures viscosity with an error not greater than =t0.1%, when used at efflux times of 80-1000 seconds. The smallest listed capillary is used for light fuel oil or kerosene, the others for lubricating oils. The temperature of the bath should be controlled within ± 0 . 0 2 ° F . In all capillary sizes as called for by the A.S.T.M.—calibrated oruncalibrated. Uncalibrated capillary, $20. Calibrated, $38. Metal frame to fit capillary, $6.
• Extraordinary resistance to chemicals • Unprecedented rapidity of flow • Dependable specific pore size • No loss of strength when wet • New order of resistance to heat AVAILABLE IN DISCS AND ROLLS
bel art
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OXbow
Write for Bulletin UV374.
MADE IN U.S.A.
Order direct or from hading
BEL-ART PRODUCTS, PEOUANNOCK. N . J .
Falling Boll Principle The falling time of the ball multiplied by other given factors shows absolute viscosity in eentipoises.
UBBELOHDE Viscosimeter
Made of sub-micron glass fibres impregnated with Teflon. Adds five features never before available.
Information available thru your dealer
MADE IN U.S.A.
4-0500
Circle No. 144 on Readers' Service Card
laboratory
supply
FISH-SCHURMAN CORPORATION 72 Port m an Road, New Rochelle, Ν. Υ.
dealers.
F
S
Fish-Schurman Circle No. 9 on Readers' Service Card
FLUID & GAS PRESSURE TANKS S T A I N L E S S & C A R B O N STEEL T A N K S (GOVERNMENT SURPLUS BARGAINS)
PROPIPETTE Safety Pipette Filler
Steel tanks f o r t h e h a n d l i n g , storage and transportation of gases, bevera g e s , f u e l s , hydraulic f l u i d s a n d other l i q u i d s . Stainless steel tanks f o r corrosive acids a n d g a s e s . F R E O N T A N K Capacity 22 o z . of Fréon F22, 6 cc Methyl A l c o h o l . WA" l o n g , 2" d i a . %' pipe thread opening at one e n d . Equipped w i t h brass valve. S h i p p i n g w e i g h t 3 l b s . F.O.B. C h i c a g o . (Six f o r $8.00). N o . AB834 Each * 1 5 0
J - 1 P R E S S U R E T A N K Stainl e s s steel, surplus aircraft oxygen t a n k . 48" l o n g , 2 4 ' d i a . Rated for 400 Ν P.S.I, working pressure, 18,000 c u . i n . v o l . , 77.9 g a l . capacity. % ' pipe t h r e a d fitting at each e n d . New c o n - D - 2 A I R T A N K Carbon steel. d i t i o n . S h i p p i n g weight 247 l b s . Capacity 500 c u . i n . (approx. 2 gals.) F.O.B. C h i c a g o . 450 P.S.I. %" pipe thread p o r t a t N o . AB832 $9950 each e n d . 2 4 " l o n g , 6 " d i a . P o s t p a i d . ( T w o f o r $8.50). G-1 T A N K N o . AB391 Each *495 Stainless steel. CORNELIUS Capacity 2100 c u . H I G H PRESSURE i n . (9 gals.) 450 (1500-2000 P.S.I.) P.S.I. V," pipe thread port at each AIR e n d . 24" l o n g , 12" d i a . S h i p p i n g COMPRESSOR weight 19 l b s . F.O.B. C h i c a g o . ( T w o Three cylinder, 3f o r $27.00.) stage c o m p r e s s o r , N o . A B 6 3 Each *1495 c o m p l e t e w i t h 27 volt, D . C . 20 a m p . motor, with f a n . Rated 1500 P.S.I, c o n t i n u o u s duty, 2000 P.S.I, intermittent. Pressure N O N - S H A T T E R A B L E C O : switch in base. A s released by A i r CYLINDER T h i s type of pres- Force, in u s e d , serviceable c o n d i sure bottle w a s used by t h e A r m e d t i o n . Covered by o u r 30 day G U A R Forces f o r inflating life rafts. 18%" A N T E E . 1 1 % " l o n g , 7" h i g h , 9" w i d e . l o n g , 3%" d i a . H a s yx" pipe thread S h i p p i n g weight 12 l b s . F.O.B. C h i o p e n i n g at one e n d . Capacity 2.98 c a g o . Limited q u a n t i t y . *35°° l b s . of COj—at 1800 P.S.I. S h i p p i n g N o . AB549 w e i g h t 10 l b s . F.O.B. C h i c a g o . Write t o d a y f o r FREE CATALOG N o . AB303 $2S» of other EQUIPMENT BARGAINS !
i/
GROBAN SUPPLY COMPANY
holds liquids indefinitely • Time Tested • No moving parts • Simple to operate The new PROPIPETTE eliminates the dangerous practice of using t h e mouth to d r a w liquids into pipettes. It is simple t o vse a n d the operator soon becomes proficient so t h a t liquids can be delivered quickly, precisely a n d safely. Measurement precision is extremely high (0.01 cc). The instrument has three agate-ball valves which operate independently a n d t h e entire procedure can be done with o n l y one h a n d . comes in black, r e d , green a n d blue . . . PRICE $ 6 . 9 0 each A v a i l a b l e through laboratory dealers.
sent on a p p r o v a l
A l l l a b o r a t o r y pipettes can be used w i t h the PROPIPETTE — Safety Pipette Filler Write
i a
for additional
information
INSTRUMENTATION
ASSOCIATES
Distributors of Laboratory and Scientific Specialties 1 7 W e e t 6 0 t h Street N e w Y o r k 2 3 , Ν. Υ.
1139 SOUTH WABASH AVE., DEPT. AB-9, CHICAGO 5, I L L , WEbster 9-3793 Circle No. 60 on Readers' Service Card 148 A
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ANALYTICAL CHEMISTRY
Circle No. 77 on Readers' Service Card
