Back MatterSource: The Scientific Monthly, Vol. 62, No. 1 (Jan., 1946)Published by: American Association for the Advancement of ScienceStable URL: http://www.jstor.org/stable/18829 .

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An Eastman Speetroscopic

Plate of Extreme Resolving Power

T HIS plate is known as Eastman Spectroscopic Plate, Type 649. It is normally supplied with GH sensi-

tizing and with antihalation backing. The resolving power is at least 1000 lines per millimeter. The plate can also be obtained unsensitized (Class 0) with lower speed and contrast.

When results of higher contrast are required and extreme resolution is not paramount, the use of the Eastman Spectroscopic Plate, Type 548-GH (resolving power, over 500 lines per millimeter) is recommended.

Both of these high resolution plates have low stain characteristics. Further information will be supplied on request.

EASTMAN KODAK COMPANY Research Laboratories Rochester 4, N. Y.

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GEORGE WESTINGHOUSE CENTENNIAL 1846-1946

This year we celebrate the 100th Anni- versary of the birth of a man the world will long remember-known interna- tionally in his time as the "greatest living engineer."

Early in life George Westinghouse showed marked inventive genius. When only 22 years old, he conceived the idea of the railway air brake... the first of many epoch-making inven- tions that made him world famous.

But George Westinghouse was not only a distinguished inventor-he also had the engineering "know how" to develop his ideas into practical, work- able form.

For example, he pioneered in the development of the first practical alternating current system for long- distance transmission of electric power . . . the steam turbine for use on land and sea . . . the induction motor ...

railway electrification and automatic block signaling.

As an industrial leader, he founded many companies that were to bring untold benefits to people all over the world. The largest of these is the Westinghouse Electric Corporation.

The story of George Westinghouse is the story of a great engineer's vision in the growth of a new nation -and in the birth of a new era.

Wherever electric power is produced and distributed ... or electricity is used in industry and the home ... or world's trade moves ... you will find equipment and practices stemming from the genius of George Westinghouse.

Following in the tradition, the men of Westinghouse are today pioneers and leaders in many industrial fields - electrical, mechanical, electronic, ceramic, plastic and metallurgical.

Westinghouse PLANTS IN 25 CITIES OFFICES EVERYWHERE

Tune in: JOHN CHARLES THOMAS-Sunday, 2:30 pm, EST, NBC TED MALONE-Monday through Friday, 11:45 am, EST, American Network

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