Electrical Symbol

By M.C. Childs

At the head of the cellar stairs
there is indicated an electric switch,
and a dotted line points down the stairs˰

In the cellar plan a 50-watt lamp is shown˰
this instrument is used˰
for transferring distances˰

An imaginary cut is
made through materials˰
outside of the border lines˰

Run the line straight through
regardless˰
erasures can be made

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