When you choose Oxford you get something extra... S/P

The new Oxford

MICRO-DOSER repetitive pipette

The system that offers you freedom of choice Π Solid or soft.

Solid system with needle (positive liquid displacement). Soft system with tip (air displacement principle).

D Disposable assemblies. One-third the cost of glass or Teflon1" syringes, and no breakage. Autoclave or discard piston. Barrel, needle and tip completely disposable.

Π 7 combinations of size and system. 25, 50 or 100 μ\ in solid or soft system. 200 μ\ in soft system. Color-coded for convenience.

• Choice of precision.* Solid system: <2 .0%. Soft system: <4.0%. "Specifications were developed from tests on production-design prototypes using water.

Π 25 dispensings — or fewer. Calibrated barrel assemblies. Load desired amount.

Dispense 25 times without refilling. Load and d ispense with one hand.

OXFORD L A B C R A T O R E S

Oxford Laboratories Inc. Subsidiary of G. D. Searle & Co.

Something extra... S/P S/P carries a lot of laboratory items. But, then, S/P is a leading distributor for more than 550 top manufacturers. To handle this huge inventory smoothly, we have 25.4 million cubic feet of warehousing space, 1.9 million cubic feet of chemical vaults, and 25 strategically located stocking centers. You benefit with a wider choice in all grades and price ranges. And we're flexible enough to stock any laboratory supply items and chemicals used in research, quality control or production specifically for you. It's all part of the S/P Responsive System of service for professionals like you. Call your S/P Repre­sentative and take stock of him.

scientific products distributor of chemicals, laboratory supplies and scientific instruments Division of American Hospital Supply Corporation 1430 Waukegan Road, McGaw Park, IL 60085

CIRCLE 191 ON READER SERVICE CARD

ANALYTICAL CHEMISTRY, VOL. 49. NO. 8, JULY 1977 · 711 A