Feature

Serum Made Safe for Even Protein-Sensitive Patients

Music Quality Affected by Humidity in the Air

Front Matter

[Photograph]: Changes Light to Electricity

American Diet Lacks Vitamins despite Nutrition Publicity

Invention Makes Electricity Directly from Sunlight

Oldest American Newspaper Still Well Preserved

Cotton Was Raised in Year One by Indians of Arizona

Mauna Loa, Hawaiian Volcano, Will Erupt within Three Years

In Science Fields

Synthetic Lubricating Oil Made out of Paraffin Wax

Specific Heats and Atomic Weights: “A Classic of Science”