INDEX. 



Sulphate of magnclia found effiorefcent on 



walls, 109 



of potafh, compofidon of, 100 



■ of foda, prepared from gypfum, 



64 — Found effiorefcent on walls in two 



ftates, no 



of tint, component parts of, 80 



Sulphites, aiialyfis of, 94 — Experiments 



on the adion of acids with, 98 

 ' of lead, component parts of, 



94 



— — of potafli, component parts of, 95 

 — 'Changes produced on, by heat, ib. 



Sulphur, experiments and obfervations on 

 its combination with phofphorus, 1— 

 Danger of expofing the compound to 

 heat, 2 — Phenomena of the diftillation 

 Of, 3 — May be combined with three 

 dofes of oxigen, 92 — External charac- 

 ters of, ioj-?*Oxigenaiion by compound 

 agents, 103 



Sulphuretted muriatic acid, produ£lionof, 

 ^04 — Properties of, ib. — Chemical ex- 

 amination of, 105 — Compofition of, 

 107 — Remarks on, ^08 



Sulphuric acid, component parts of, 95 — 

 Seems to be formed whenever fulphur 

 is acidified or fublirped, 97, 98 



^lilphurot^s acid, properties of, 93— Con- 

 tains fuiphuric acid, 94 — Analyfis of, 

 515-^15 probably a compound of {ulphu- 

 t'li acid and fulphur, 97 



Sumach, chemical examination of, 36 



Super-fulphate of pota/h, produftion of, 

 99 — Component parts of, 101 



Swedenborg's vifions philofophically ac- 

 counted for, 171 



Swediaur, 179 



Syphon, imjjrovement in, 218 



Syftem, animal, dlfquifitions on the de- 

 rangement of,*229 



t. 



Tannin, method of obtaining it pure, 33 

 f^U moft abundant in the interior wbite 



bark, 35 — Relative quantities in diffc* 

 rent barks, ib. — Various fubftances in 

 which it exifts, 37 — Its fpecific agency 

 always the fame, 38 — Affinities and 

 habitudes of, ib. — Mutual action with 

 extractive matter, 40 



Tanning of Ikins, experiments on, 33— • 

 Difference between the flow and quick 

 proceffes, 33, 40 — Extraftive matter is 

 abforbed during the operation, 39 — Its 

 perfeftlon not to be judged of by the 

 jncreafe of weight, 40 — Vegetables 

 which are of moll value in, ib. 



Teas, chemical examination of, 37 



TeJefcopes, reftefting, caufes of the dif- 

 appointments in the ufe of, jO 



Temperature of bodies, muft be eftimate4 

 according to their capacities for caloric, 27 



Tennhart, 17* 



Thenard, 93 — Remarks on the acetite of 

 lead, 223 



Thompfon, Dr. on the compounds of fuU 

 phur and oxigen, 92 



Thought, fpeculations on its nature delU-t 

 five, 162 



Tides, memoir on the, 239 



Timbers of houfes, method of fecurine; 

 decayed, 120 



Titanium, reduction of its oxide, 62-r* 

 Properties of, 63 



Tongue, obfervations on the ftrufture of, 

 276 — .Cafes in which a portion was fe- 

 parated without affefting the nervom 

 fyftem, 277 



Trees, decayed, method of reftoring, 124 

 — 'Teftimonials of its fuccefs, ^iS 



Tremler, 71 



Tromfdbrff, 62 — Chemical analyfis of ar- 

 feniated hidrogen gas, 200 



Tungften, is not acidifiable^ 134— Me- 

 thod of obtaining, 135 



Unguentum ntitritum, on the compofition 

 of, 13P 



Van 



