Feature

Virus Cell Reproduction

‘Flu Epidemic Doubted

Blue Tongue, Sheep Virus Spread by Common Gnat

Science and Society at AAAS

Cancer in Food Animals

Developing Corn Resistant to Borer

Patent Business Booming

Front Matter

Plant Root Takes in Minerals Just above Tip

[Photograph]: Germ-Free Studies

Best Plant Slips Come at Non-Flowering Season

New Machines and Gadgets