Julius Schwartz

1907

• Magnify and find out why
• Elementary school science and how to teach it
• It's fun to know why
• Through the magnifying glass
• Uphill and downhill
• Comment fabrique-t-on le caoutchouc, le papier et le fer
• Earthwatch
• Go on wheels
• I know a magic house
• Magnify and find out why
• Now I know
• Spaceclusters