The following articles and book reviews from this issue are available online.
Articles
- Clothesline Paradox. by Steve Baer
- Local Dependency by Stewart Brand
- The Double Bubble Wheel Engine by Steve Baer
Book Reviews
- Dictionary of Tools by R.A. Salaman
- Solar Energy Thermal Processes by John A. Duffie and William A. Beckman
- Solar Energy Digest by Solar Energy Digest