Automobiles will be cheaper than horses are today. Liquid-air refrigerators will keep great quantities of food fresh for long intervals. Huge forts on wheels will dash across open spaces at the speed of express trains of today. They will make what is now known as cavalry charges. Hot or cold air will be turned on from spigots to regulate the temperature of a house as we now turn on hot or cold water from spigots to regulate the temperature of a bath. Man will see around the world. Persons and things of all kinds will be brought within focus of...