Category:Nathan Cobb

Media in category "Nathan Cobb"

The following 2 files are in this category, out of 2 total.

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  Dr. N.A. Cobb, technologist of the Dept. of Agric., who has discovered that by the use of a piece of glass he can invoke the aid of the sun in making microscopic studies of minute objects. LCCN2016893516.jpg 7,752 × 10,008; 7.46 MB
  
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  Nathan Cobb Nematologist.JPG 253 × 332; 10 KB