COORS
MANUFACTURERS' LITERATURE
U. S . A.
Sulfur Analysis. Six-page bulletin describes method and required equip ment for rapid analysis of sulfur in hydrocarbons by a high-frequency com bustion titration procedure. Labora tory Equipment Corp. 22
*Ρο*6#& Sottam
CRUCIBLES
Spectrophotometer. Six-page folder describes and gives specifications for direct ratio, automatic recording spectrophotometer for use over in frared, near infrared, visible, and ultra violet ranges. The Perkin-Elmer Corp. (Model 18-1'). 23
Catalog No. 311
Ignition Capsule COORS New Porous Bottom Crucibfe is fast gaining acceptance by discrimi nating chemists everywhere. By an exclusive process, Coors pro duces a sturdy, dependable filtering crucible that gives unlimitable service under the most exacting conditions.
BULLETIN SENT UPON REQUEST Obtainable from your laboratory supply dealer.
COORS PORCELAIN COMPANY
To protect Crucible bottom
| · ACID WASHED INDIVIDUALLY TESTED | · ? W - u « DISC WILL NOT CRACK ON IGNITION PRECISION CONTROLLED POROSITY Each crucible is individually tested for flow rate a n d pore diameter.
GOLDEN, COLORADO
For further information, circle number SO A-1 on Readers' Service Card, page 37 A
PROPIPETTES SAFETY PIPETTE FILLER ELIMINATES THE DANGER OF BURNS AND POISONING OF MOUTH PIPETTING —GIVES SUBTLE AND COMPLETE CONTROL. HIGH MEAS UREMENT PRECISION OF 0 . 0 1 cc. DELIVERS LIQUIDS QUICKLY—HOLDS LIQUID AT SET LEVEL INDEFINITELY. SIMPLE TO OPERATE.
• Skimming off with precision minute quantities of liquid floating above a sediment without danger of mixing as in serum from red blood corpuscles and micro-analysis.
Laboratory Apparatus. Catalog sup plement of 64 pages describes 350 manufactured and specialty instruments and includes current price list of 14,000 items. Central Scientific Co. 28
Research and Development Services.
• Transferring sterile samples of liquids to other tubes and containers. • TRANSFERRING RADIO-ACTIVE SOLUTIONS. A l l laboratory pipettes from the smallest to those exceeding 50 cc. can be used with "Propipettes."
STANDARD SCIENTIFIC 3 4 West 4 t h Street
SUPPLY CORP. New York 12, Ν. Υ.
A L L THE APPARATUS, EQUIPMENT, SUPPLIES, CHEMICALS A N D REAGENTS NEEDED T O RUN T O D A Y ' S M O D E R N LABORATORIES For further information, circle number 50 A-2 on Readers' Service Card, page 37 A
50 A
Pyrometers. Line of thermocouples, protection tubes, thermocouple and extension wires, and accessories is de scribed in 16-page catalog. Arklay S. Richards Co., Inc. 27
Brochure of 28 pages describes and illustrates representative services in consultation, research and development, analysis, and testing offered by Truesdail Laboratories, Inc. 31
• Skimming off and measuring the liquid floating above a chemical precipitate.
each
pH Meter. Four-page bulletin de scribes advantages of a line-operated electronic pH meter which covers pH range from 0 to 14 without switching and without reversal of pointer travel. Photovolt Corp. (Model 110). 26
Microscopes. Bulletin presents in formation on camera, metallurgical, phase contrast, stereoscopic, and other types of microscopes supplied by United Scientific Co. 30
• Transferring corrosive, toxic, infectious, ill-smelling liquids such as acids, alkalies, cyanides, sulphides, bacteriologi cal cultures, chloroform, ether, urine, blood, excrements, dyes.
$ 90 6
X-Ray Unit. Twelve-page booklet describes x-ray unit for application in both diffraction and microradiography techniques. The unit is distributed in the United States by Jarrell-Ash Co. (Hilger Micro-focus X-Ray Unit). 25
Oscillographic Recorder. Directwriting oscillograph which has a re sponse up to 900 cycles is described in folder of 4 pages. Technology Instru ment Corp. 29
These new "Propipettes" eliminate the dangerous practice of using the mouth to draw liquids into pipettes. They are simple to use and the operator quickly becomes proficient so that the liquids can be delivered quickly, precisely and safely. Measurement precision is very high: 0.01 cc. The instrument has three agate-ball valves which operate independently and the entire procedure can be done en tirely with one hand. "Propipettes" are recommended for:
Catalog No. 7 7 9 9 0 .
Gas Analyzers. Booklet describes operation and gives performance data for two models of infrared gas analyzers. Liston-Becker Instrument Co., Inc. 24
Intercommunication Systems. Fea tures and components of intercommuni cation system for use in laboratories, offices, and plants are described in 4page folder. Rochester Scientific Co. (Talk-O). 32 For further information, see coupon on page 37 A ANALYTICAL
CHEMISTRY
