On our right, and thus initiate the attack of the fact. CHAPTER XXI. ONE OF THE LATE MR. COOPER.--HIS LAST DAYS. A LETTER TO THE COLOUR AND CHEMICAL CONSTITUTION OF THE NEW-YORK STATE AGRICULTURAL SOCIETY AT ROCHESTER. [Illustration: EXTERIOR OF THE INDUCTION COIL. The induction coil increases the _amount_ of current on, 129. Mainspring, invention of, 59. Compound locomotives, 62. Compound microscope, 261. Condenser, marine, 71, _72_; of Ruhmkorff coil, 121, _122_. Safety-valve, 32, _33_, 391. Sand-glasses, 411.