Young Whitney had no tools, but he soon made them; had no wire, but he drew his own wire, and within a few months he perfected the cotton gin. When the cat climbs upon the crate filled with chickens, it thrusts its paw between the laths and pulls off the feathers, leaving the chicken behind the laths. Young Whitney substituted wires for laths, and a toothed wheel for the cat's paw, and soon pulled all the cotton out at the top, leaving the seeds to drop through a hole in the bottom of the gin. Within a year every great planter had a carpenter manufacturing gins for the fields. With Whitney's machine one man in a single day could clean more cotton than ten negroes could clean in an entire winter. Planters annexed wild land, a hundred acres at a time. For the first time the South was able to supply all the cotton that England's manufacturers desired. The cities in England awakened to redoubled industry. Southern cotton lands jumped from $5 to $50 an acre. Whitney found the South producing 10,000 bales in 1793. Sixty years later it produced 4,000,000 bales. Historians affirm that this single invention added $1,000,000,000 as a free gift to the planters of the South. Although Eli Whitney took out patents, every planter infringed them. Whole States organized movements to fight Whitney before the courts. In 1808, when his patent expired, he was poorer than when he began. Feeling that the Southern planters had robbed him of the legitimate reward of his invention, Whitney came North and gave himself to the study of firearms. He invented what is now known as the Colt's revolver, the Remington rifle and the modern machine gun. Beginning with the feeling that he had been robbed of his just rights by Southern planters, Whitney ended by inventing the very weapons that deprived the planters of their slaves and preserved the Union. But the new prosperity and the increased acreage for cotton in the South created an enormous market for slaves, and soon the sea swarmed with slave ships. Prices advanced five hundred per cent, until a slave that had brought $100 brought $500, and some even $1,000. What made slavery no scourge, but a great religious moral blessing? The answer is, the cotton gin and the cotton interest that gave a new desire to promote slavery, to spread it, and to use its labour. For Eli Whitney had made cotton to be king. Cotton encouraged slavery; slavery at last threatened the Union and so brought on the Civil War.