INDEX. 501 
p. 309. Has difcovered the ufe of the lymphatic 
gland?, the thymus, and the fpleen, p. 323. 
Higgins , Dr. B. on adual fire, and detonation produced by 
the contact of tin-foil, with nitrous fait of copper, 
P* 1 37 ; 
Hornjby , Profeffor Thomas, on the motion of Arflurus* 
and diminution of the obliquity of the ecliptic, p. 
93, &c. 
Hudforis , Bay, fifties fent from thence to the Royal Society, 
p. 150, &c. 
Humor , definition of that word by Mr. De Luc, p. 407. 
Different, at different heights, p. 440. How it diffufes 
itfelf, p. 451. The warmer it is, the more it feparates 
the parts of bodies, p. 457. 
Hungarian wines, their different fpecies, p, 300. 
Hunter , Mr. John, anatomical obfervations.on the torpe- 
do, . p. 48 1 . 
Hygrometer , a new one contrived by Mr. De Luc, p. 404. 
Defcribed, p. 415. Obfervations made with it, p. 42b. . 
How accurate, p. 429, 430. How to be improved, 
p. 432. Phenomena obferved with it, p. 439. Dif- 
ferences in the fun and in the fhade, p. 448. Falls lefs 
in fummer than in winter, p. 457. And why ? p. 459, 
L 
JackJon, Humphrey, Efq. on the manner of making the 
Ifinglafs, p. 1, &c. Went to Rufiia to difcover the. 
art, p. 4. 
Icthyocolla. See Ifinglafs. . 
Igneous fluid,, its influence on the. dilatation- -of bodies, by • 
humidity, p. 459. 
Johnfon , Sir William, on the Northern Indians ©E America, 
p. 142, &c. 
Jones y William, Efq. his deduction of the properties of 
the conic fedtions, p.- 340. 
Incriif - 
