INDEX. 



Spe&ade*, letter from Mr. E. Walker on, 



Squa.e, to find the fide of one equal to a 



circle, 152 

 Stalactites, formation of calcareous, 166 

 Statistics, queftion relative to, 302. 

 Steinhauer, Mr. his account of an ancient 



Egyptian fculpture, 4 

 Stone, on the ufe of a large block of, in 



fixing a pendulum, 72 

 Succinate of cerium, 11 

 Sugar of milk, chemical examination of, 



259 

 Sulphate of iron, on its ufe as a manure, 



206 — 242 

 of magnefia, probaWy not inju- 

 rious to vegetation, 240 

 Sulphuret of iron, two kinds of, 273 

 Surveying, a fimple and accurate method 



of, 103 

 Sylvcfter, Mr. C. on galvanifm, ic6 



Table of obfervations made at different 

 heights in the air, 2S8 



of the rapidity of heating and cool- 

 ing according to the bulk of bodies, 



71 



T. C. B. his defcriptlon of a fimple in- 

 ftrument for making drawings from na- 

 ture, III 



Telefcope, true sera of the invention of 

 the, 3—92—145 



Temperature, on the degtees of facility 

 with which bodies admit of changes in 

 their, 70. -^-On that at which water 

 po defies the greateft denfity, 93 



Temp e, Sir W. 248 



Tennant, Smithfon, Efq. on two new 

 meta!s in placina, 24 — 140 



Teffier, Abbe, 22S 



Theon, 146 



Thenard on the fuming liquor of Cadet, 

 6— 141 — 285 



Thermometers for aeroftatic experiments) 

 »79 



ThicknefiV, Ra. £fq. his remarks on 



galvanifm, 30 

 Thomfon, Dr. 23. — Remarks on fome 



paffages in his Chtmiltry, 245 — 271 

 Thunberg, 301 

 Torpidity of animals in winter, queftion 



reflecting the, 301 

 Trapeguntius, 146 

 Trees, experiments and obfervations on 



the motion of lap in, 289 

 Triangles, on certain properties of, 234 

 TromfdorrY, 8S, — His experiments on the 



production of artificial camphor, 132 

 Tronghton's pyrometer, 81 

 Trumbull, Mr. 222 

 Trumpet, mathematical theory of the 



fpeaking, 160 

 Tull, Mr. 227 

 Turner, Mr. 222 

 Tycho Brahe, 147 



V. 



Van Mons, 18 



Van Norden, 14— iS 



Vauquelin, 24 — 139 — 141 



Vegetables, converhon of the proximate 

 principles of, into biti.men, 1S1.— 

 Queftion refpedting the fources of car- 

 bon in, 301 



Vegetation, probably not injured by ful- 

 phate of magnefia, 240. — Effects of 

 metallic falts on, 241 



Venturi, 82 — 136 



Vitreous fufion is diftlnd from that of 

 fait?, 58 



Vitriol, green, on its ufe as a manure, 

 206 



Volta, 57 



Von Troil, 188 



W. 



Walker, Mr. E. on the horizontal moon, 

 108.— Remarks on his experiments on 

 the horizontal moon, 156. — On fpec 

 tacles, 243. — His remarks on the ima- 

 ges formed by convex lenfes, 276 



Water, 



