INDEX. 



page 



168 

 382 



49> 6 4 

 68 



273 

 277 



143 



46 



447 

 416, 429 



375. 397 



255. 



Tadpoles, experiments on their light, 



Tanning principle, remarks on, 



Telescopes, on penetrating into space by them, 



— on their magnifying power, 



— on viewing the sun advantageously with them, 



experiments with them, 



Temperament, on that of musical intervals, 



Thermometer, register of, at Lyndon, in Rutland, 



Thermometers, on their sensibility, 



Torpedo, remarks on its electric apparatus, 



Tortoise shell, experiments on, - 



Trigonometrical survey. See Survey. 



Tubipora musica, experiments on, - 333, 362 



V 



Vibrations, on those of different elastic fluids, - - 124 



on the frequency of those constituting a given note, 133 



on those of chords, - - - 134 



on those of rods and plates, - - 140 



Vision, observations on, - - - - 49 



Voice, human, remarks on, - - - - 141 

 Volta, Mr. Alexander. On the electricity excited by the 



mere contact of conducting substances of different kinds, - 403 



m 



Weather of 1798, remarks on, 47 



Willow, remarks on its bark, - 3^ 2 



Wollaston, William Hyde, M. D. On double images 



caused by atmospherical refraction, - 239 



Wood, shining, experiments on its light, - - 177, 179 



Y 



Yolk of egg, remarks on, - - - - ## 3^9 



Young, Thomas, M. D. Outlines of experiments and inquiries 

 respecting sound and light, - - - - 1Q 6 



z 



Zoophytes, chemical experiments on, - - - 3 2 7 



From the Press of 



W. BULMER W Co. 



Cleveland-Row, St. James't. 



