Science: A Look at a Molecule

The first clear picture ever made of a molecule was last week shown on a lantern slide. Some of the ablest U.S. scientists—members of the American Philosophical Society, founded 198 years ago by Benjamin Franklin—gaped in awe, for they were seeing something never before distinctly seen by man.

The slide was shown by Wendell Meredith Stanley of the Rockefeller Institute for Medical Research to the annual meeting of the Society in Philadelphia. It was a picture of the virus which causes the mosaic disease of tobacco plants, one of the largest molecules known to...

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