Ever been driving down a strange road, stretching your neck every which way in hopes of spotting a sign that would tell you where you were? It's enough to drive you crazy.

But it won't anymore. You can put an end to this highway mad­ness by putting Arthur H. Thomas's map promotion to work for you. We'll send you a Rand McNally road map—of any state you want, in­cluding the District of Columbia and Puerto Rico—every time you place an order of $100 or more from our new catalog of scientific appa­ratus and chemical reagents.

There's no limit to the number of orders you can place or to the number of benefits you can get from our catalog. It lists over 20,000 laboratory items and chemical

reagents, telling you everything you need to know to make an intelligent purchase. Photographs or sketches accompany every item, too, so you're never at a loss as to what the product looks like.

The next time you're looking for sci­entific apparatus, why not look into Thomas—a one-location source for all your laboratory needs. We ship by truck, rail, sea, or air to wherever you are. And we do it within 2 to 3 days of receiving your order. In fact, we deliver so quickly you could get your order faster from us than from distributors in your own city!

Just think. With the Thomas

catalog and Rand McNally maps, you'll never have to make a wrong turn again.

To get your first free map, just send your order of $100 or more to Arthur H. Thomas Company, Vine Street at Third, Box 779, Philadelphia PA 19105. Or call it in, collect: Northern region (215) 574-4555; Eastern region (215) 574-4645; Southern and Western regions (215) 574-4650.

CIRCLE 202 ON READER SERVICE CARD

State your order. Then order your state.

A R T H U R H .

THOMAS C O M P A N Y

Serving labs the world over since 1900.