Part 1 — THE METRIC SYSTEM IN COINS.
Reading edition
It may not be generally known that we have in the nickel five-cent piece of our coinage a key to the tables of the linear measures and weights of the metric system. The diameter of this coin is two centimeters, and its weight is five grams. Five of them placed in a row will, of course, give the length of the decimeter; and two of them will weigh a decagram. As the litre is a cubic decimeter, the key to the measure of length is also the key to measures of capacity. Any person, therefore, who is fortunate enough to own a five-cent nickel may be said to carry in his pocket the entire metric system of weights and measures.
GIVING THE BABIES AN AIRING.
