Full View, Table Model
CONTRIBUTED ARTICLES
CHROMATOGRAPHY DRYING OVEN
Ultracentrifugal Method for Determination of Serum Lipoproteins
For Fast, Uniform Drying of Paper Chromatograms
1397
Luigi Del Gatto, F. T. Lindgren, and A . V . Nichols
Determination of Titanium and Iron in Titaniferous Materials by Cerate Titrimetry
1399
J. O . Page and A . B. Gainer
Accurate development of four 1 8 l 4 " x 2 2 ' / 2 " »sheets simultaneously
Determination of p-ferf-Butylbenzoic Acid in Coco nut O i l - T y p e Modified Alkyds
Model CD-4 is a thermostatically controlled, in sulated oven which quickly reaches temperatures up to 110° C. Achieves evacuation of solvent vapors with water or motor aspirator. Heating elements concealed in base are protected from combustible, solvent droplets. Heavy metal-reinforced safety glass door readily permits temperature readings and ob servation without repeated opening of door. Stain less steel oven chamber is corrosion-resistant. Overall Dimensions: 2 7 " wide; 3 5 % " high; }4'A" deep UNCONDITIONAL 1 YEAR GUARANTEE Write for Catalog CDA-89
1402
P. J . Secrest and Bogumil Kosciesza
Modification of Innes Equation for Determining Sur face Areas of Low-Area Solids
1404
Louis Bin! a n d R. L. Disch, Jr.
Determination of Alpha, Beta-Unsaturated Acids and Esters by Bromination F. E. Critchfleld
1406
Dye-Binding Capacities of Eleven Electrophoretically Separated Serum Proteins
1408
R. D. Strickland, T. R. Podleski, F. T. Gurule, M . L. Freeman, a n d W . A . Childs
NEW BRUNSWICK SCIENTIFIC CO. NEW
Determining Serum Proteins Gravimetrically Agar Electrophoresis
BRUNSWICK.
after 1410
R. D. Strickland, P. A . M a c k , F. T. Gurule, T. R. Podleski, Circle No. 64 on Readers' Service Card
O . Salome, and W . A . Childs
NEW PRECISION ROTAMETER FLOW KITS metering tubes interchangeable to ± 2 % in any given size Brooks' new Sho-Rate* Rota meter Kits feature "slip-out" metering tubes that you can change in minutes, without spe cial tools or knuckle-cracking effort. Guaranteed interchangeability—to ± 2 % in any given size—preserves the validity of previously derived data . . . assures future reproducibility. Kits available for a wide range of flow ranges from 0.7 cc/min to 2230 cc/min (water) or 55 cc/min to 148.0 CFH (air). In dividual calibration curve fur nished with each tube and float combination. •
5C >
Rigid side-plate construc tion made for operation at pressures up to 200 Qpsi and temperatures to 250 F. Precision-bore metering tubes have integral rib guides to center float ac curately. Base is self-leveling, has built-in spirit level. S i n g l e - and f o u r - t u b e models available.
Send for Specification Sheet
ROTAMETER
6 A
·
CO.
8 5 9 Β Street
Lonsdale, Pa.
Specialists in Complete Rotameter
Instrumentation
Circle No. 107 on Readers' Service Card ANALYTICAL CHEMISTRY
1413
W . H. McCurdy, Jr., W . J . A . Vanden Heuvel, a n d A . R. Casazza
Determination of Zirconium in Zirconium Driers. EDTA Titration in 1 to 4 Sulfuric Acid
1417
C. F. H i m and C. A . Lucchesi
. . . .
1419
Viscosity of Fluids at High Pressures. Rotating Cylinder Viscometer and Viscosity of n-Pentane .
1422
Burner for Cyanogen Flame Spectroscopy Keiichiro F u w a , R. E. Thiers, and B. L. Vallée
H. H. Reamer, G . Cokelet, and Β. Η. Sage
1428
Radiochemical Separations of Cadmium J. R. DeVoe a n d W . W . Meinke
Melting Point Apparatus for Simultaneous Observa tion of Samples in Transmitted and Reflected Light
Carminic
.
.
.
Acid
. H. E. Ungnade, E. A . Igel, and B. B. Brixner
Procedure
for
Determination
1432
of
D. L. Callicoat a n d J. D. Wolszon
1434
Separation of Microgram Quantities of Boron by Mixed Resin Bed Ion Exchange
1437
Boron
55-140-1
*Trade name of Brooks Rotameter Co.
BROOKS
Quantitative Separation of Copper, Cadmium, and Zinc by Precipitation of Sulfides with Thioacetamide
D. L. Callicoat, J . D. Wolszon, and J. R. Hayes
Corrections
1357,1374,1421
