Feature

[Photographs]: Synthetic

American Cockroaches Produce Large Families

Yellow Fever Vaccinations Now Safe from Jaundice Peril

Age and Sex Help in Diagnosis of Lung Cancer

Scientists Pool Knowledge, Report Data to WPB

Natural Vegetation Used in Highly Successful Camouflage

[Photograph]: Land Battleship

Beefsteak Shortage Foretaste of Post-War Meat Hunger

50,000 Blood Donors Weekly Needed to Supply Quota

Fast-Growing Chinese Elm Shows up Well in Tests

In Science Fields

New Machines and Gadgets