29.—Spines and prickles play an import.^ in the defence of plants against animals, pear at all heights, but they in greater numbers close to the part refiring protection: nature provides these spines and prickles just-where they are most required. In the case of our local Gleditshia—that stately Li EH and every one which continued the idea was noted by experts in ER. branches.
One of the suggestions made here long before the Naci invasion rehearsal last Septem! was ible oil p the surface trailed overhead: and streams of hi on the tanks from in which Australians have proposed to dis-the these suggestions kad the current would be earthed at once through the metal of the and the crews would be unharmed, device which is given much attention is that which is mentioned in Charles Play "The Flashing Stream'—a, robot which would be sent aloft to hunt enemy raiding planes and destroy: them. Guns which outrange the Big Berthas of the present war, many: improvements on existing warplanes and new versions of airplane engines are also popülar. Some Australians' ask as müch as a half million dollars for their plans.
In New Zealand, the Defence Minister W. Frederick Jones, recently the inventions board has operating since ihe outbreak of war. T. officers of Army, Navy and Air Force ce-operate in dealing with all suggestions received. "Every suggestion, no mutter how fantastic it may appear, gets serious attention, and if a plan practicable steps are taken at once to put it into mical officers.
offered free as a contribution to the national war Virtually every suggestion made pad drive.
Text read from the printed page and cleaned; old type leaves the occasional error.