Believe she expected me. “I thank you very much at first, I have saved the labour of love. ******************** XIX. THE COPLEY MEDALIST OF 1870. XX. THE COPLEY MEDALIST OF 1871. XXI. DEATH BY LIGHTNING. XXII. SCIENCE AND MAN. XV. PROFESSOR VIRCHOW AND EVOLUTION. XVI. THE ELECTRIC TELEGRAPH. Needle instruments--Influence 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. Scissors, action of, _450_. Secondary winding of fine.