t S>8 I 
Cavallo , ’Tiberius , magnetical experiments and obfervations, p. 62. 
Caufland , Richard M e , particulars relative to the nature and cufloms of the Indians of 
North America, p. 229. 
Cavendj h, Henry, Account of Experiments made at Henley-Houfe, HudfonVBay, 
relating to Freezing Mixtures, p. 241. 
Celano , Lake of and the emiffary made by the Emperor Claudius for draining it, vifited 
by Sir William Hamilton, p. 268. 
Child-birth , on the dangers of, p. 354. Calculation of the extra danger of twins, ibid. 
On the weight and fize of the head of male and female children new born, p. 357. 
'The greater danger to the mother from male than female children, p. 361. Ahllradf 
of the regifter of the Lying-in Hofpital at Dublin from Dec. 1757 to Dec. 1784* 
P- 3 6 3 - 
Cicero , his villa in the province of Abrnzzo converted to a chapel, p. 369. 
Circles , much done by Tycho Brahe, Hevelius, and Dr. Hook, refpe&ing the dividing 
of, p. 2. Review of the labours of the learned to accomplifh this defign, p. 2. 
Explanation of Mr. Hindley’s method of dividing circles into any given number of 
parts, p, 19. 
Clarke , Jcfeph, Obfervations on feme Caufes of the Excefs of the Mortality of Males 
above that of females, p.349. 
Chy , the difficulty of obtaining it of the fame thermometric properties, p. 398. The 
difficulty remedied by a mixture of alum earth, p. 402. The fix changes it under- 
goes by different degrees of heat, p. 403. Mixed with alum earth fuffers no enlarge 
ment by ignition, p. 406. 
Clock Faces , bed feen at a diftance with the figures orange and the ground indigo; or 
the figures red and the ground green, p. 346. 
Cochineal , gold (hells fo called, fuppofed to be a fpecies of cochineal in the pupa (hue* 
P . 169. 
Colds , the caufe of their prevailing moll during the cold autumnal rains and upon 
breaking up of the frofl in the fpring, p, 298. 
Cellini , B . (lory of his feeing devils run on the tops of houfes at Rome, p. 319. 
Colours and Light, new experiments on the ocular fpe&raof, p. 313. 
Comet , advertifememt of the expe&ed return of that of 1532 and 1661 in the year 178 B ^ 
p. 426. A prize of 60,00 livres offered by the Royal Academy of Sciences at Paris 
for computing the difturbances of the above comet, and thence to predict its return* 
p.428. Table of computed places of the comet on fuppofition that it ffiall return to 
its perihelion, jan. 1, 1789, p.430. 
Copley , Sir Godfrey, his medal for 1785 given to Major-General Roy, for his admea- 
furement of a bafe on Hounilow-Heath, p. vii.. 
Copper , magnetical experiments on, p. 72. 
Crocodile , the petrefied bones found at St. Peter’s Mountain, near Maeflricht, fuppofed 
to have been crocodiles proved to belong to the Phyfeter 01 Breathing-fiffi, Delphinus, 
Of 
