from 75 to 150 mm. Slightly less than 2'/ 2 gross of 12-mm. diameter tubes can be washed in one load. Both washer and basket are stainless steel. Washer measures 14V2 Χ Π ? / 8 Χ 15y 4 inches. 9
ACE Sintered Glass Filters ACE New Increased HARDNESS Gives i-o-n-g-e-r Life No Contamination due to detachment of Filter Particles
Gloves
Gloves suitable for laboratory use are being molded from polyvinyl film by Houghton Laboratories, Inc. Hyflex 340 plastic gloves are resistant to acids, oils, resins, and alkali solutions. Originally developed especially for handling of miniature assemblies in plastic potting operations, they have been found of value for general labora tory work. 10 Melting Point A p p a r a t u s
Fisher Scientific Co. has redesigned its Fisher-Johns melting point appa ratus for more convenient use. Con trols and heating stage have been com bined into a single compact unit. Con trols have been simplified, with the variable transformer now graduated in per cent power input for continuous and reproducible control of heating rate. The stage is illuminated. Accuracy of the apparatus is within 1° to 2° C. without calibration or 0.5° C. with calibration.
8610 7295
8562
6130
7300
STANDARD UNIFORMITY Each Filter Plate Is Individually Tested For Porosity and Hardness
8575
Filter Discs Fiber Glass Sintered FILTERS (U.S. Paf. No. 2,136,170)
The First A m e r i c a n M a d e Sintered Glass Filter
POROSITY CHART A few|crystals of sample are placed between cover glasses, the resulting sandwich is put in the heating stage de pression, and the heating rate set. Crys tals are observed through an integral low-power lens, and the thermometer projecting from the side of the stage is read at beginning of melt and again when melting is complete to determine melting point range. 11
In the following
Millimeter
Sizes
Porosity Description
Max. Pore Dia. Micron
A
145-175
Β
70-100
C
25-
50
D
10-
20
Ε
4-
8
10-25-30-40-50-65-90- ) 20- Τ 50 Water Deionizer
A device for rapidly changing tap water into the chemical equivalent of triple distilled water has been introduced by Central Scientific Co. Called Quickpure, it consists of a 16-ounce poly ethylene squeeze bottle with a mixture of cation and anion exchange resins on the bottom. Tap water poured into the bottle comes into contact with the resins and is purified. A specially designed cap permits the water to be discharged without the For further information, see coupon on page 41 A V O L U M E 2 6, NO. 5, MAY
1954
Available
from
Stock
Send for Complete Brochure Listing the ACE Line of Sintered Glass Filters and other filter media DEP'T S F - Ε
ACE GLASS VINELAND
INCORPORATED NEW JERSEY
For further information, circle number 45 A on Readers' Service Card, page 41 A
45 A
