t 489 ] 
be produced, ibid. Not thought to be natives of this country, ibid.. Their multi- 
tudes, and the great deilrudtion caufed by them, ibid. p. 219. Defcription of them, 
ibid. The inftruments with which the female pierces the leaves for the reception 
of her eggs, defcribed, p. 220. Defcription of the caterpillar, p. 221. Manner of 
its forming its chryfalis coat, ibid. Thought to be the Tenthedro of Hill, ibid. 
Black voadd, fome experiments upon the Ochra friabiiis nigra fufca of Da Cofla, called 
by the miners of Derbyfhire, Black Wadd, by Jofiah Wedgwood, p. 284.. May 
with as great propriety be called Manganefe as Ochre, p. 285. Refult of different 
experiments on, ibid, et feq. 
Blagden , Dr. Charles. See Quickffiwr. 
Blumenbacb, M. John Frederic. See Quickjifoer* 
Braun, M. Jofeph Adam. See Quickfdver. 
C. 
Caffini, M. See Solar Spots. 
CaJJlus , why the procefs for preparing the precipitate of, frequently fails, p. 34. 
Catterpillar. See Black Canker. 
Cavallo, Mr. Tiberius. See Air-pump. 
Cawndijb, Henry, Efq. See Eudiometer , fdiickfiher. 
Cayenne pepper , dangerous confequences of ufing it to excefs, p. 93. 
Cazalet , M. See Quickjflver. 
Chappe d'Aut erode, Abbe. See Quickjiher. 
Chaulnes , Duke de. See Sel fujible D'Urine. 
Chymical affinity , or attradion. See Mineral Adds . 
Cicirelli , a filh like white-bait, on the coaft of Calabria, p. 200. 
Clujius. See Ambergrife. 
Cold , is not produced by mixing fnow with any fubftance, unlefs part of the fnow is 
diffolved, p. 312. 
Cuttle-fjh. See Ambergrife . Grows to an enormous fize in the ocean, p. 236. See 
Spemaceti IVhale . 
D. 
Decompofitions. See Mineral Adds. 
Double Jlars. See Sun and Solar Syjlem . 
Dudley . See Ambergrife . 
E. 
Earthquakes , Count Fr. Ippolito’s letter to Sir William Hamilton, K. B. giving an 
account of that in Calabria, March 28, 1783, p. i. Calabria at all times expofed to 
terrible convulfions, ibid. Caufes of thofe phenomena, p, ii. Dates of the four 
S f f 2 moft 
