Shovels, hoes, axes — any cutting tool before sharpening, it is useful to hold at least an hour in a weak solution of
salt and, without wiping, start sharpening metal will be easier to sharpening.
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ATLAS PROFILES
PROFILE "NACA-6409". Developed in the early 30-ies in the aerodynamic laboratory of the NAC (USA) for lifting aircraft-biplanes. This profile can be recommended as models of gliders...
DRYING… MAGNET
In the last issue, we reported on the unusual at first glance, the method of drying wood in the bath water, between the electrodes, the supplied current of industrial frequency. This...
