What are the best kinds for the various crops I raise ... must be injected into the ground to avoid loss of ammonia (gaseous) nitrogen to the air The dry or solid fertilizers plus liquid non-pressure ...

Liquid nitrogen might be overkill in this case; the goal is to cool the plastic down below its brittle transition temperature, which for most plastics is about -40° (420° R). Dry ice will do the ...

The best result was with liquid nitrogen inside the engine. With the nitrogen quickly boiling at room temperature, the aeolipile quickly spun up to a great speed. The engine stand had to be ...