In one of the rooms of your magazine for the last years drew attention to the Council graphitize — a convenient box with a piece of lace for sharpening a slate pencil. I propose to use for the same purpose a small tin can: othernote inside cover stick-on sandpaper — graphite in the sharpener will sypitsya to the bottom.
L. MAKSUTOV, Vratsa
Recommend to read
ROTATES FIELD
In a previous article under the heading "electronics for beginners" (see "M-K" № 8, 1979) we understand how magnetic field is formed it Turned out that, in particular, generates supplied...
REINVENT THE WHEEL
With this proposal, despite the well-known skeptical saying, our magazine appealed to readers in No. 6, 1969, published a compilation about some unusual designs and a description of the...
