For countless ages birds had been constructing comfortable houses out of chips of wood and grass amidst the branches of trees. Man followed their example. He, too, built himself a nest and called it his "home." He did not, except in a few parts of Asia, take to the trees which were a bit too small and unsteady for his purpose. He cut down a number of logs. These he drove firmly into the soft bottom of a shallow lake. On top of them he constructed a wooden platform and upon this platform he erected his first wooden house. It offered many advantages over the old cave. No wild animals could break into it and robbers could not enter it. The lake itself was an inexhaustible store-room containing an endless supply of fresh fish. These houses built on piles were much healthier than the old caves and they gave the children a chance to grow up into strong men. The population increased steadily and man began to occupy vast tracts of wilderness which had been unoccupied since the beginning of time. And all the time new inventions were made which made life more comfortable and less dangerous. Often enough these innovations were not due to the cleverness of man's brain. He simply copied the animals. You know of course that there are a large number of beasties who prepare for the long winter by burying nuts and acorns and other food which is abundant during the summer. Just think of the squirrels who are for ever filling their larder in gardens and parks with supplies for the winter and the early spring. Early man, less intelligent in many respects than the squirrels, had not known how to preserve anything for the future. He ate until his hunger was stilled, but what he did not need right away he allowed to rot. As a result he often went without his meals during the cold period and many of his children died from hunger and want. Until he followed the example of the animals and prepared for the future by laying in sufficient stores when the harvest had been good and there was an abundance of wheat and grain. We do not know which genius first discovered the use of pottery but he deserves a statue. Very likely it was a woman who had got tired of the eternal chores of the kitchen and wanted to make her household duties a little less exacting. She noticed that chunks of clay, when exposed to the rays of the sun, got baked into a hard substance. If a flat piece of clay could be transformed into a brick, a slightly curved piece of the same material must produce a similar result. And behold, the brick grew into a piece of pottery and the human race was able to save for the day of tomorrow. If you think that my praises of this invention are exaggerated, look at the breakfast table and see what pottery, in one form and the other, means in your own life. Your oatmeal is served in a dish. The cream is served from a pitcher. Your eggs are carried from the kitchen to the dining-room table on a plate.