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Foreign Astronomers to Lecture at Harvard

Says Lost Viking Found America on Detour

Nature Ramblings: Tree Thermostats

Biblical Plagues Still Weaken Egypt’s Health

Studious Laboratory Cat Breaks down Emotionally

Front Matter

Remarkable Results Claimed for Arthritis Treatment

[Photograph]: Sulfanilamide Discovered

No Trace Left of Gold That Ransomed the Inca

New Super Pure Metals Approach 99.9999 per Cent.

Hillside Fortifications Found at Ruins of Van

Exploding Uranium Atoms May Set off Others in Chain