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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CHERNIHIV PATENTS
Children in a hurry. They are in a hurry to become adults. This children's line for the purpose of education first used, perhaps, to A. S. Makarenko. He loaded the boys a real job and...
THE FLASHER-PROBE
Electric circuit "call" usually with a tester or device with audible indication. The probe, about which we talk today, informs about the health of an electric circuit with a light...
