By deadening a floor, for instance, we mean inserting between the ceiling of the room below and the floor above, or in the instance of a deadened wall, between the two sides of the wall, some substance like felt, paper or other non-conductor of sound, which will prevent the sound waves from passing through. This deadens them to the passing of sound or makes them sound-proof. What Makes the Sounds Like Waves in a Sea Shell? The sounds we hear when we hold a sea shell to the ear are not really the sound of the sea waves. We have come to imagine that they are because they sound like the waves of the sea, and knowledge that the shell originally came from the sea helps us to this conclusion very easily. What Are the Sounds We Hear in a Shell? The sounds we hear in the sea shell are really air waves or sounds made by air waves, because all sounds are produced by air waves. The reason you can hear these sounds in a sea shell is because the shell is so constructed that it forms a natural sounding box. The wooden part of a guitar, zither or violin is a sounding box. They have the faculty of picking up sounds and making them stronger. We call them “resonators,” because they make sounds resound. The construction of a sea shell makes an almost perfect resonator. A perfect resonator will pick up sounds which the human ear cannot hear at all and magnify them so that if you hold a resonator to the ear you can hear sounds you could not otherwise hear. Ear trumpets for the deaf are built upon this principle. Sometimes when you, with your ear alone, think something is absolutely quiet, you can pick up a sea shell and hear sounds in it. But the sea shell will magnify any sound that reaches it. It would be possible, of course, to take a sea shell to a place where it would be absolutely quiet and then there would be no sounds. There are such places, but very few of them. A room can be built which is absolutely sound proof. [Illustration: SIBERIAN LAMBS IN SOUTH DAKOTA] The Story in a Suit of Clothes Where Does Wool Come From? We could not write the story of a suit of clothes without dealing largely with the sheep, for it is only from the wool of the sheep that the best, warmest and most lasting garment can be made. In order that we may properly understand the development of the great wool and clothing industry in America we must supply a brief history of our sheep industry, for the sheep must always come before the clothing. Who Brought the First Sheep to America?