To know the exact diameter of the wire will fail, and no micrometer or Vernier caliper, if you use … normal range.
This is quite tightly wound on the rod a small number of turns of wire, then measure the width of the winding divided by the number of turns: the number obtained will be the required diameter.
Recommend to read
A TRIO FOR LINEN
Even hand washing, and especially the use of the washing machine involves pre-sorting the accumulating of underwear - largest, according to the color or strength of the material....
FIND “THE FOX”
In the early 30-ies of the radio Amateurs of the Soviet Union, mastering of ultrashort waves, for the first time faced the necessity of direction finding of radio transmitters. The...