This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
Quite frequently small particles of steel, splinters, or thorns are run into the flesh and cannot be removed with the fingers. These can be readily removed in the following manner: Press the eye of an ordinary needle over the protruding end, then turn the needle until the edges bind or clinch. While in this position, raise the needle and out comes the splinter.
Ill: The Eye of a Needle Slipped over a Thorn for Removing It from the Flesh
A fine luster can be given to zinc by rubbing it with kerosene or a weak solution of sulphuric acid.