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DYNALAB CORPORATION P. O. BOX 112 · DEPT. A

ROCHESTER 1, Ν. Υ.

How to File a Card in...25 Places at Once

For the busy scientist, engineer, teacher, business man or student who has to keep basic information on file for use in a variety of categories, the Geniac P M U (Portable Memory Unit) is specially de­signed.

Information retrieval systems for personal use or small card flies (from 1000-10,000) with abstracts, original articles or information are usually cumber­some, expensive and out of the question for small budgets. But our P M U is low cost information retrieval system tha t is as fast or faster than much more expensive units.

Low initial cost, only S19.95 for the basic kit with two hundred cards, notcher, sorting rods and cod­ing instructions, low maintenance with new cards costing S4.00 per 100 or S30.00 per 1000, are com­bined with ready access to thousands of categories. No electrical vibrators or mechanical shakers are needed. No parts to go out of operation. Sorting is by rod and is remarkably rapid.

Sorting rates are conservatively 400 per minute and this is for simultaneous sorting of at least. 25 categories, using extra rods.

Information is coded into the cards by notching prepunched holes around the edge of the card. The user need have no previous knowledge of coding and may choose as many categories as is necessary.

To use you prepare an abstract on the card or aetually paste on small articles, microprints, etc. Once coded the card is filed at random and will automatically appear during sorts for the cate­gories it contains. The possibilities of the P M U information retrieval system are unlimited and enable the small to medium size information file to compete in flexibility with extremely expensive electronic sorting devices. I t serves as a useful adjunct to company integrate information systems.

The Geniac Portable Memory Unit and informa­tion retrieval system is a quality products design for long use. The basic P M U contains a notching hand punch, sorting rods. 200 cards and is only SI 9.95. Add 60£ postage and handling in the United States, Sl.fiO abroad. In NYC add 3 % City Sales Tax. Additional cards are S4.00/100, S30.00/1.000. File cabinet $8.00.

Send check or money order to Dept . C52C or telephone OR-4-3720

OLIVER GARFIELD CO., INC. 17 St. Marks Place New York 3, Ν . Υ.

I N D U S T R I A L L I T E R A T U R E

Bakélite Resins. Tabulates the chem­ical composition, physical data, key prop­erties, and uses for Bakélite resins for coatings. UNION CARBIDE PLASTICS C O .

L 60 Biochemicals. Research guide and

price list for some 3000 biochemicals. Bulletin 128. M A N N RESEARCH LABORA­TORIES, INC. L 61

Borohydrides. Reviews the properties of sodium, potassium, rubidium, and cesium borohydrides. M E T A L HYDRIDES, INC. L 62

Cadmium Pigments. Describes line of cadmium pigments for plastics, rubber, and polymers. UNITED MINERAL & CHEMICAL CORP, L 63

Chromatographic Analysis. Describes system for continuous automatic chroma­tographic analysis of amino acids. T E C H -NICON CHROMATOGRAPHY CORP. L 64

Chromatography Supplies. Lists chromatographic supplies and accessories

available. ANALYTICAL ENGINEERING LABORATORIES, INC. L 65

Economics in Research. Evaluates technically oriented studies in corporate planning. BATTELLE MEMORIAL INSTI­TUTE L 66

Electroplating. Guide to electroplat­ing with fluoborates. MEAKER C O . L 67

Gallium. Outlines basic information concerning the element gallium. C H E M ­ICALS DIVISION, ALUMINUM C O . OF A M E R ­ICA L 68

Industrial Chemicals. Gives typical analysis, and physical properties for sulfuric acid, sulfur dioxide, hydro­fluoric acid, chromic acid, alum, and allied products. DIXON CHEMICAL I N ­DUSTRIES L 69

Laboratory Equipment. Contains ten­tative minimum standards for wood lab­oratory equipment. SCIENTIFIC APPARA­TUS MAKERS ASSOCIATION L 70

May 21, 1962

Readers' Information Service Use this handy self-mailer to obtain further information or literature.

( I n q u i r y c o u p o n is va l i d un t i l A u g u s t 20.)

Circle desired items below; fill out all information on reverse side and mail.

CHEMICALS C

EQUIPMENT Ε

LITERATURE L

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30 31 32 33

60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

Don't forget to fill out reverse side of coupon.

TO: C&EN Readers' Information Service Erickson Data Processing Division 78 Fifth Avenue New York 11, N.Y.

FASTEN HERE ONLY | 4 FASTEN HERE ONLY

102 C & E N M A Y 21 , 1962

4rf S t a m p

Is a new product or product improvement hiding in these applications of petroleum waxes?

About the author Lowell Crews* knowledge of the applica­tions for wax comes from more than 10 years'* research on the uses of the product. Crews is a group leader in American OiVs research laboratory. He holds a masters degree in chemistry from Okla­homa State College.

ik -k * * Petroleum waxes have enormous un­discovered potentials in the develop­ment of new products in the specialties field and for the improvement of pres­ent products. Here are six applications of waxes that may give you ideas.

1- Chlorinated waxes. Paraffin wax, reacted with chlorine, is extensively used for flameproofing canvas tarpau­lins, tenting, and as an ingredient of light colored floor tiles.

2. Match manufacture. Treatment of the matchstick—either paper or wood —helps the flame ignite the stick by supplying an easily vaporized hydro­carbon fuel.

3. Electrical equipment. Since wax has the electrical insulating properties of oil, extensive uses are found for it as

insulation. It is likewise widely used as a moisture-vapor barrier. Still other properties extend its use in the elec­trical field. It is employed in impreg­nating cloth and paper insulation. In asphalt-impregnated cotton insulation, wax is used to reduce viscosity of the i m p r e g n a t i n g c o m p o u n d . In con­densers, it is used to drive out moisture and to support condenser elements. In dry cells, wax is used because it resists chemical reaction. In cable splicing, wax drives moisture out of the splice or junction. It is also used to hold the joint in position.

4. Metal cas t ing . "Investment" or "Lost Wax" casting is a widely used process for casting metal parts whose intricate shapes would be difficult, if not impossible, to machine. The wax makes possible extremely fine toler­ances. Wax is also used in castings where vents are needed to hold in gases and then release them.

5. Textiles and cordage. Wax binds protruding fibers to their cores. As a

by LOWELL CREWS

coating to thread, it improves appear­ance, imparts desired stiffness, reduces wear and fraying.

6. Food processing. The use of wax paper for food wraps and the use of wax for carton coating are familiar applications of this versatile material. Less well known is the protective coat­ing of foods, vegetables and fruits with wax. Because a thin film of wax on the surface of plant tissue effectively in­hibits moisture loss and wilting, some citrus fruits, apples, cantaloupes, toma­toes, cucumbers, peppers and eggplant are marketed today with a coating of wax emulsion. Wax coatings are also used to protect cheese, rutabagas, tur­nips and parsnips. In addition to its protective action, wax also gives fruits and vegetables an attractive sales-appealing gloss.

American Oil offers a line of both paraffin and microcrystalline waxes. Men experienced in wax application are ready to work with you on your ideas for new products or product i m p r o v e m e n t s . Ca l l y o u r n e a r b y American Oil Company office.

| | I would like to know more abou t t he use of ΓΠ Please have one of your representat ives waxes in appl icat ions. cal l .

AMERICAN OIL COMPANY 910 South Mich igan Avenue · Room 1 5 2 3

Chicago 8 0 , I l l inois

NAME-

POSITION.

COMPANY-

ADDRESS—

C & Ε Ν 103

AMERICAN

COLONIAL SE SURFACTANTS

SUCROSE ESTERS NOW COMMERCIALLY AVAILABLE

Η Η Η Η Η Η Η Η Η Η Η Ο H C - C - C - C - C - C - C - C - O C - C - C - C H 2

H H H H H H H H H H H

1 \ | Η Ο , ς Η >Ο^Η A—°—\ Ά

ÇH H / \ H H O /

H OH *OH *H

CHa OH

Sucrose Esters of fatty acids, which are novel SOLID NONIONIC SURFACTANTS, WAXES and OILS with unique chemical structures and physical properties, are offered in a wide range of chemical compositions, HLB values, solubilities and other physical properties. Available in commercial quantities in various grades suitable for application and evaluation as detergents, emulsifiers. dispersants, corrosion inhibitors, wetting agents, anti-block and anti-slip and anti-static agents, tackifiers, thickeners and thixotroping agents in:

DETERGENTS · CHEMICAL SPECIALTIES · ADHESIVES, AGRICULTURAL CHEMICALS · TEXTILE CHEMICALS · LUBRICANTS AND PETROLEUM PRODUCTS · METALWORKING COMPOUNDS · PAINTS, PLASTICS, PIGMENTS · POLISHES · ORE FLOTATION · PAPER COATING· DRILLING MUD · FOOD · COSMETICS · PHARMACEUTICALS · DENTRIFRICES

For new prices, literature, and samples, write:

SUCRO · CHEMICAL DIVISION COLONIAL SUGARS CO., Gramercy, Louisiana

SIMPLE, SAFE,

PRECISE LABORATORY PIPETTERS!

LaPine Clinac Pipetters provide complete safety from all types of contamination by eliminating mouth pipetting. They give superb, precise control with a simple, easy-to-use thumb roller.

These pipetters allow the pipette angle to be changed so the operators hand can be held at a natural angle. Pipette graduations can be seen easily from the best position for greater accuracy in skimming off minute quantities of liquid or in delivering fractions of a drop with an accuracy of .01 ml or better.

LaPine Clinac Pipetters can be used in either right or left hand without alteration.

No. Ν 341-80 LaPine Clinac "S tanda rd " Pipet ter , - for volumet­ric, measuring, and serological pipettes of various sizes and diameters.

Each $15.00

No. N 3 4 1 - 8 2 LaPine C l inac " M i c r o " P ipet ter - espec ia l l y suited for blood pipetting and establishing chromatography patterns. For pipettes up to approximately 1000 microliters. Each $12.50

LAPINE LAPINE SCIENTIFIC COMPANY 6 0 0 1 SOUTH KNOX AVENUE, CHICAGO 2 9 , ILLINOIS, U .S .A . · REIiance 5 -4700 JN THE EAST: SOUTH BUCKHOUT STREET. IRVINGTON-ON-HUDSON, NEW YORK · LYric 1-8900 «Π J H g WEST; 22& McGEE AVENUE, BERKELEY 3, CALIFORNIA · THornwall 5-3$l4 '

Laboratory Flash Evaporators. Il­lustrates and gives technical data for laboratory flash evaporators. L A P I N E SCIENTIFIC C O . L 71

Particulate-Spectrum Instrumenta­tion. Lists and describes four basic in­struments for the recording and analysis of the particulate spectrum. ROYCO I N ­STRUMENTS, INC. L 72

ρ Η Meter. Describes p H meter de­veloped for industrial measurements. CAMBRIDGE INSTRUMENT CO. , LTD. L 73

Process Pumps. Discusses construc­tion features, operating characteristics, and benefits of CSO process pumps. Bulletin 52B9999. ALLIS-CHALMERS M F G . C O . L 74

Foundry Facilities Illustrates and explains the foundry facilities of Haynes Stellite Co.

Covers invest­m e n t - c a s t i n g , resin-shell cast­ing, sand and c h i l l c a s t i n g , and slip casting p r o c e s s e s for supplying the company s alloys in the necessary form for any particular use. Includes expla­

nations of the finishing facilities, technology department, and inspec­tion and quality control sections. HAYNES STELLITE CO. , DIVISION OF UNION CARBIDE CORP. L 75

Pumps. Illustrates and gives perform­ance data on YSL-WF aluminum-bronze fitted centrifugal pumps. Bulletin WF-62. MARLOW P U M P S L 76

Radiochemicals. Gives activity and price of radioactive chemicals for re­search. Bulletin J. N E W ENGLAND NUCLEAR CORP. L 77

Rare Chemicals. Lists and gives prices of 10,000 rare chemicals. CHEMICALS PROCUREMENT LABORATORIES, INC. L 78

Thermostat Metals. Gives technical data for Truflex PR thermostat metals. METALS AND CONTROLS, INC., A DIVISION OF TEXAS INSTRUMENTS, INC. L 79

Torque-Flow Pump. Illustrates and gives uses for Torque-Flow pump. Bul­letin P10-B46. W E M C O DIVISION OF WESTERN MACHINERY C O . L 80

Vacuum Components. Illustrates and gives specifications for line of V-4 vacuum components. Bulletin V-4-14. MRC M F G . CORP. L 81

Water and Waste Treating Equip­ment. Buyer's guide to line of water treatment and waste treatment equipment. Bulletin 4913. PERMUTIT C O . L 82

Water Conversion. Describes basic flash evaporation and vapor compression cycles for salt water conversion. Bulle­tin B-8609. WESTINGHOUSE ELECTRIC CORP. L 83

Further useful information on Literature mentioned is readily available Use handy coupon on page 102

104 C & E N M A Y 21, 1962

A. LaPine Clinac "Standard" Pipetter

B. LaPine Clinac "Micro" Pipetter |

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