c/o A.Word.A.Day: Hodges' model - Walk the (dual!) chalk line

A.Word.A.Day

with Anu Garg

'Having a tool is like having a superpower in your pocket. With the right gadget, you can do much more than what arms and legs alone allow -- build a magnificent pyramid, lift water from deep below, or even predict whether you’ll need an umbrella tomorrow.

And not all tools need wires, batteries, or instruction manuals. Sometimes, a simple device can save labor -- a lever, a pulley, a piece of string dusted with chalk -- can save hours of sweat and toil.'

chalk line