INDEX 



his new pyrometer, 



Schmidt, Mr. J. G 



Schnaubert, on the aaion of phofphorus 



on metallic folutions, 138 — 141 

 Scott, Mr. James, his defcription of a 



Compenfation curb, 19 — 21 

 Seguin, z^z 



Seppings, Mr. R. his method of obviating 

 the necefllty of lifting fhips, 182 — 188 

 Ships, method of obviating the neceffity 

 of lifting, 182— T 88— New fid for the 

 upper mafts of, 186 

 Silver, new and cheap method of purify- 

 ing, 125 — Adion of phofphorus on 

 folutiou of, 139—Method of feparating 

 copper from, 142 

 Simmering of water, caufe of, 216—220 

 Sinclair, Mr. 32 



Smeaton, Mr. his eftimate of a horfe- 

 power, 96— His meafure of forces, 

 151, 265 

 Smith, Mr. 104 

 Soumille, Abbe, 4 

 Sound, memoir on the propagation of, 



127 — 131 

 Spiders' webs, applied to flight wounds, 

 291 — A cure for agues, ib — Analyfis 

 of, 292 

 Stacio, 60 

 Star, variable, in Sobicfki's fhield, irvefti- 



gation of the changes in, 271 — 281 

 Stars, remarks on their conftitution, 274, 



z8o 

 Steam engine, defcription of a portable 



one, 93 

 Steel, method of giUUng upon, 215 — 

 From India, 221—224, 284 — 290— 

 Method of coating with platina, 282 

 Steinacher, on the redlificatioa of nitric 



acid, 134 

 Stocker, Mr. 154 



Stodart, Mr. James, his method of gild- 

 ing upon fteei, 215 — Of covering fteel 

 or brafs with platina, 282 

 Stone, found propagated to a great diftance 



through, 129 

 St. Vx-iin, M. di, 29* 



Sulphate of bafytea, method of decof»f 



pofing, 161 

 Sulphur-alcohol of Lampadius, 170 

 Sun, or hemp of the Bengalefe, 34, 43, 46 

 Sylvefter and Hopfon, Meflrs. malleability 



of zinc difcovered by, 304 

 Sympathy, phyfxcal, occafion of 195 



Talc found In vafl: quantities In India, 195 



— For what puvpofes u If ed there, ib. 

 Tan, perhaps ftrengrhens vegetable as well 



as animal fibres, 38, 42 

 Tar, weakens ropes, 39, 42 

 Taylor, Mr. C. 121 

 Tchitchagoft', Vice-admiral, 299 

 Tennant, Mr, his difcovery of two ne\f 



metals in crude platina, 59 

 Thermometer, Lalande'spropofal forane\f 



fcale of the, 6i 

 Thenaid, 77 

 Thiout, inventor of the detached fcape- 



ment, 5 

 Thoelden, Mr. A. F. his letter on the ge- 

 ocentric places of the new planets, 99. 

 Thomfon, And. Efq. his new and cheaj* 

 method of purifying gold fiiver, 125— 

 127 



Dr. 75, 79, 80, 82, 84, 85, 251 



Time keeping machines, on the conflruc- 

 tion of, I — 5 — Compenfation curb for, 

 19 — Accurate method of banking the 

 balance of, 114 

 Tin, attion of phofphorus on folution of, 

 140— Recent muriate of, the moft de- 

 licate teft of mercury, 179 

 Topaz, fluoric acid difcovered in, 58 

 Topographical delineations, improvements 



in, 203 

 Trevithick, Mr. 9$ 

 Trommfdorfl', 133, i68, 169 

 Troughton, Mr. the fteel wites of hh 

 pendulum too flight, i 



Vacuum and fafety valve combined, 143 

 Vafcutarity of animals limited, 193 



Vauquelin, 



*■ 



