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And Now, The Atlantic

One of the Last Areas to be Conquered By Commercial Air Transport . . . Technical Advances Have Outrun Political and Industrial Plans

By Reginald M. Cleveland

Bridge Builder, Lawyer, Manufacturer: Astronomers

Bone Surgery With Machine Tools

Grafting Bones is Much Like Grafting Trees . . . Bone from Your Own Body . . . Cut with a Circular Saw . . . Shaped on the Spot with a Bone Mill

By Fred H. Albee M.D., F.A.C.S.

The Great Serpent Mount In Ohio

By Captain Dache M. Reeves

Minor Planets—II

By Henry Norris Russell

Junk To You

A Billion Dollar Industry in Scrap Metals . . . Revolving Resources Save Ore and Coal . . . The "Alloy Age" Has Introduced New Problems

By Philip H. Smith

The Amazing Growth In The Use Of Wood Pulp

By Logan U. Reavis

Trisecting The Impossible

Why the Angle Trisector is Wasting His Time . . . the Problem is Insoluble—Demonstrably So . . . But the Perennial Aspirant Works On and On

Can They Take It?

Amateur Seismology

Half Amateur, Half Professional . . . Constant Battle . . . Listing the Difficulties . . . No Royal Road to this Scientific Hobby . . . Work . . . Work

By Albert G. Ingalls

New Caissons Speed Work

By R. G. Skerrett

Energy From The Sun

Step by Step Solar Engines Increase in Efficiency . . . May Reach Economical Level as a Power Source


  • 50 Years Ago in Scientific American, April 1936

  • Recommended

    Book Reviews, April 1936

  • Departments

    Way Down Under In A Bauxite Mine

  • Our Point Of View, April 1936

  • Treasure, Still A Puzzle and more

  • Current Bulletin Briefs, April 1936

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