INDEX. 513 



Page. 



Civilization, a condition of unstable equilibrium 327 



Clark, Mr. Henry W., observations by, on the aerial echoes 504 



Clay balls in the fire employed to increase amount of heat 289 



Close, Mr., inventor of automatic fog-bell 490 



Cloud, induction from, exerted at great distances 199 



Coast line United States, length of, requiring maritime lights and 



signals 365 



Cohesion as strong in the liquid as in the solid form of matter 218, 353 



Cohesion of liquids, experiments on 217, 218 



Coil of copper ribbon, influence of, on self-induction 94, 97 



Coil of wire when long, electrical eflTect of 112 



Coils, influence of, on " intensity " of current 113 



College of New Jersey, galvanic battery for 80- 



Color-blindness, hereditary predisposition to, noticed 238 



Color-blindness, hypotheses for explanation of 239 



Color-blindness, more common among men than women 238 



Color-blindness, remarks on 233 



Conductor, spiral, influence of, on galvanic current 108 



Contributions to Electricity and Magnetism 80, 92, 108, 149, 200 



Copper handles to conductors, effect of 88 



Copper ribbon in flat spiral, intense spark from 87 



Copper ribbon (silk wrapped), self-induction from 94 



Copper ribbon, two strand, spark from 88 



Courtenay, Mr., inventor of the whistling-buoy 487, 488 



Cruickshanks trough, effect of, on induction 117 



Currents by induction from ordinary electricity 105 



Current, secondary effect of, upon human body 98 



Current, self-induction of, effects of 106, 131 



Currents of successive orders, alternation in direction of 1.30 



Currents of various orders of induction from electric spark 107 



Daboll fog-trumpet, description of 393, 397, 412 



Daboll trumpet, experimental test of 384, 395, 406 



Dalton, Dr., his experience in color-blindness 236 



Daniell's battery employed in experiments 150, 153 



Davis, Captain John L., co-operation of, in observations on sound. 437 



Davy, Sir H., observations of, on electro-magnetization through 



interposed plates 122, 126 



Decomposition of liquid by current from long wire 88 



Decomposition of liquid by single pair of galvanic plates 95 



De la Hive's ring, modiflcation of 5 



Direction of induction currents of several orders, alternation in 130 



Directions of successive orders of induction dependent on dis- 

 tance 137, 138, 143 



Discovery and invention different 319, 320 



Duane, Gen'l James C-, co-operation of, in observations on sound 487 



Duane, Gen'l James C, observations of, on sound 389, 404 



83 



