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Rotating Galaxies

That the Spiral Nebulae Rotate is Now Beyond a Doubt. Our Own is Not Much Larger than Others

By Henry Norris Russell

Post-War Possibilities

Extensive Growth Forecast in Employment, in Both Manufacturing and Service Branches of Aviation

By Alexander Klemin

Harnessing the Sun

Research on the Practical Problem of Power and Heat from the Sun A Progress Report from M. I. T.

By John A. Sibley

From the Ground Up

Our Chemical Industry Had the War Time Advantage of Starting Practically from Scratch

By Douglas M. Considine

Cement Aids Oil Production

Deep Oil Wells are Controlled and Conserved by Application of High-Speed Cementing Process

By Andrew R. Boone


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Gifts for Mom

Mother’s Day is Around the Corner