If the room is cold, and you work at a Desk and do you have cold hands — warm them, here is an unusual mini-fireplace, build which is not particularly difficult. You only need a curved polished metal sheet on a heat-resistant stand, and a bunch of tablets of dry alcohol, familiar to tourists and hunters.
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UPGRADED RAKE
A lever mounted on the rake (figure 1), will greatly facilitate the work of the gardeners when released from the teeth of grass or foliage. Make it from steel wire diameter 6 ... 8 mm....
PISTON — JET
Every year fewer and fewer aircraft with piston engines. Lightweight, economical running on cheaper than gasoline, fuels, jet engines replacing piston even from agricultural aviation....
