Tell me straight
Question: It occurred to me that without an implement such as a ruler, I
would not be able to draw a straight line. But in order to produce a ruler, I
would need a straight line to compare it with. How were the first completely
straight tools produced?
Answer: The easiest way to create a straight line is by using a tightly
stretched piece of string. The method is still used at construction sites for
longer distances than a ruler can cover.
Daniel Soomer
Tallinn, Estonia
Answer: My father was a signwriter and he never used…
