466 iNDEX. 
Ships of War, advantages of Sir R. Seppings’s curvilinear form 
in the construction of the sterns of, 325—332 
Sicily, meteorological remarks on the volcanoes of, 322—324 
Slates (artificial), process of preparing, 432 
Smalt, detected in refined sugar, 444. 
Soda, on the relation between the crystalline form and chemical 
proportions of the neutral arseniate and phosphate of, 206, 
206; and of the bi-phosphate and bin-arseniate of, 417, 
418 
Spinal Nerves, observations on the morbid influence of, 296—298 
Steam-Engine, notice of a history of, 224; remarks on steam- 
engine chimneys, 224, 225; beneficial employment of pota- 
toes in steam-engines, to prevent the formation of calcareous _ 
incrustations in them, 444 
Steel, experiments on the alloys of, 377, 378 ; on the magnetism 
of iron and steel, by percussion, 376, 377 
Stars, catalogue of the polar distances of thirty-nine principal 
stars, 186—188; corrections in right ascension of thirty-six 
principal stars, 192 
Sterns of ships, advantages of the curvilinear construction of, 
325—332 
Stodart (J. Esq.), experiments of, on the alloys of steel, 377, 378 
Strength of cast-iron, remarks on, 223, 224 
Strychnine, new researches on, and on the processes employed 
for its extraction, 217—219; new process for extracting it, 443 
Subeck (Dr.), new electro-magnetical experiment by, 442 
Sugar (refined), smalt detected in, 444 
Sugar-cane Juice, change of, 438 
Sulphate of lead, uses of, in the Arts, 230—231; ona peculiar 
sulphate of alumina, 435 
Sulphur, experiments and researches on a new class of com- 
pounds of, 433—435 ; 
Sulphurets, on the eomposition of the alkaline sulphurets, 209 ; 
experiments to determine if the hepar, formed in the dr 
way, is a sulphuret of an oxide, or of a metal, 209—213; 
experiments on the different proportions in which potassium 
can combine with sulphur and with sulphuretted hydrogen, 
213—215; combinations of sulphuretted hydrogen with 
potash, 215, 216; formation of hepar in the humid way, 
419, 420 
Temperature of the Atlantic, remarks on, 117—125; of the 
interior of the globe, 207; of vapour, 439, 440 
Thermometers, variation of, 441 
Titanium (metallic), notice of, 441 
Transactions of the Royal Society, for 1822, analysis of, 160 
172; 375—390; of the Geological Society, notice of, 454 
