Science: Moisture Gauge

Because damp wheat makes musty flour, because damp wood makes warped boards, grain and lumber dealers asked Canada's National Bureau of Research for a quick, cheap way of measuring the moisture of their goods. The Bureau instructed Professor Eli Franklin Burton of Toronto University to work on it; he put one Arnold Pitt, his graduate student, at the task. Last week their invention was perfected.

It is an electrical moisture gauge, which puts to practical use the knowledge that the more moisture a thing contains, the easier electricity can flow through it.

Student Pitt measured the conductivity of various samples of grain...