What capacity do you need in your laboratory presses? W a b a s h has the w i d e s t c h o i c e — f r o m 12 to 200 tons capacity. W a b a s h Hydraulic Presses offer the p r e c i s i o n and repeatability d e m a n d e d in critical w o r k — r e s e a r c h , testing, pilot plant, p r o d u c t i o n . Our 30 years of press b u i l d i n g e x p e r i e n c e assures dependability.
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Write for our new L a b o r a tory Press Bulletin L 9 6 8 — g i v e s s p e c i f i c a t i o n s o n all models. Wabash Hydraulic Press Division, Wabash Metal Products Company, I n c . , 1525 M o r r i s St., W a bash, I n d . 46992.
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Optical crystals now available from Optovac: NaCI, KBr, KCI, NaF, LiF, CaF2, Bah, SrF2, MgF2, Laser and Research Crystals Cell Windows—Optovac's cell window blanks are semi-finished . . . precisely dimensioned and rough ground, ready for polishing. For many uses, a quick cloth buffing is sufficient. The technique is similar to that for restoring fogged windows, and is readily learned with practice. The savings will surprise you. Spectroscopists can now meet a budget as well as maintain a larger inventory of sampling acces sories to help get the most from their instruments. Also, difficult or messy analyses can be performed with little worry about the cost of cell damage. Every piece is inspected to maintain strict quality standards. Service is quicker, too. Common sizes are stocked. Since Optovac grows its own optical crystals, unusual pieces can be promptly fabricated from bulk material on hand. The Optovac Sodium Chloride Brochure contains price infor mation and techniques for working rocksalt crystals. Lens and Prism Blanks—Close tolerances on diameter and thickness can be maintained to facilitate optical finishing. Opto vac's 100% inspection is your guarantee of uniformly high quality. Lasers and Research Crystals—Emphasis on crystal quality and careful study of growing conditions have led to an unusual Optovac competence in its field of hallde crystal preparation. A new Optical Maser and Doped Crystal Brochure by Optovac contains information on polished and coated rods, laser blanks, and doped research crystals. In addition to the Sodium Chloride and Optical Maser Brochures, a 56-page General Catalog is available. Transmission curves, index of refraction data, and other physical properties are included for all Optovac crystals. Write for your free literature, today. HZIF»TCIVAE1
OPTOVAC, INC. NORTH
BROOKFIELD, MASS. Tel: ( 6 1 7 ) 8 6 7 - 6 4 4 4
CIRCLE 24 ON READER SERVICE CARD LABORATORY
GUIDE
HYDRAULIC
PRESSES CIRCLE 199 ON READER SERVICE CARD
FREE
73 CATALOG Send for FREE 73 illustrated catalog. Contains scientific instruments and apparatus in fields of Analytical Chemistry and Biological, Clinical, Metallurgical, Mineralogy, Physical Sciences. Items include stirrers, shakers, shaker baths, incu bators. Waring Blendor accessories.
[berbech
P.O. Box 1024, A n n Arbor, Michigan
Please send illustrated Catalog 73 Name Company. Street City
.State.
-Zip.
01535
CIRCLE 613 ON READER SERVICE CARD AUGUST 1972 259 LG
