Feature

Mosses Are Easy to Keep but Not so Easy to Study

Senate Safety-at-Sea Report Brings Better Fire Resistance

“Shapes” of Rainstorms Determine Their Effects

Ten Enemies Oppose Man’s Use of Wood Products

First Glances at New Books

Geologists Are to Study “First Texans”

First Glances at New Books

Front Matter

Chemistry Able to Destroy Our European Civilization

[Photograph]: Ground Sloth and Glyptodont

Comfortable Week-End Cruises to North Pole Are Foreseen

New Attack on Cancer to Seek Early Treatment