INDEX. 



Read, Mr. John, his condenfcr, 383 



Robertfon, 67 



Robifon, Profeflbr, 59, 300 



Boy, Genera!, 245 



Rumford, 158, 164, 175 



Sarjcant, Mr. H. his cheap engine for 



railing water, 60. — On fulphate of ba- 



rytes, 253 

 Saufl'ure, M. de, 291 

 Schcele, 8, 97 

 Schemnitz, hydraulic engine of, improved, 



1. — Compared with Goodwyn's, 3 

 Schroeter, Dr. J. H. his letter refpeding 



the new planet of Olbers, 20, 58, 142 

 Science, account of books, 223 

 Seeds, effects produced by the germina- 

 ; tion of, in atmoipheric air, 151 

 Seguin, 116 

 Selkirk, Earl of, 230 

 Senebier, 96 

 Sheldrake, Mr. Tho. on the preparation 



of indelible ink, 237 

 Short, 164 



Shuckburgb, Sir George, 245 

 Silk buried in the earth, remarks on, by 



the Rev. T# Wiiftn, 222 

 Smith, Mr. 179 — Dr. 265 

 So;ia, experiments on the production of 



fulphate of, by Dr. Campbell, 117. — 



Account of the method by which it is 



at prefent prepared for the maiket, by 



Mr. Accum, 241. — Its value, 242. — 



Method of preparing it in Pruffia, 243 

 Sound, deflection of, 91. — Diagram to 



fhew the effects of, on the head, 123. 



Its effects on the barometer, by Sir H. 



C. Englc field, 181 

 Southey, Mr. 218 

 Spedding, James, Efq. his engine for raif- 



jng water, 6i 

 Stahl, 18 

 Steam engines, obfervations on the beams 



of, by Mr. J. C. Hornblower, 68 

 §ieam, apparatus for heating water by 



means of, by Mr. Arthur Woolf, 203 



Stones, experiments on, foppofed to ha^e 

 fallen on the earth, by Edw. Howard, 

 Efq. 216, 254 



Stove of Guyton, 24 



Stromager, Mr. 121 



Sugars, new procefs for claying, by Cit. 

 Haflel Lacbenaie, 187 



Sumach, its qualities, 201 



Supporters of combuftion, n 



Tanin, Memoir on, by M. Prouft, 198 

 Tanning, obfervations on, by Cit. Merat 



Guillot, 70 

 Tellurium, account of, 62 

 Terry, Mr. Garner? his improved mill for 



grinding hard fubftances, 206 

 Thumfon, Dr. Tho. his improvements in 



the doctrine of combuftion, 10, 92, 



151.— Remarks on his theory of com- 



•buftion, 206 

 Time Pieces, irregularities of diminished, 



by Mr. Ezckiel Walker, 70. — On the 



variation of rate in, by Mr. E. Walker, 



273 



Tremolite, on its phofphorefcence, by the 

 Comtc de Bournon, 290 



Trevithick, Mr. Richard, 5. — His me- 

 thod of applying a temporary forcer to a, 

 pump, 216 



Troughton, his ufe of fpider's webs in the 

 foci of tejefcopes, 23. — His comparer, 

 24.7 



Tfcharfey, Major, 63 



Vacuum, effects of on fpontaneous light, 



104 

 Valentine, Louis, his remarks on the Ma- 



moth, 138 

 Valli, 298 

 Vauquelin, 192, 199.— On the boracite, 



120 

 Ventriloquifm, obfervations on, by Mr* 



John Gough, 122 

 Vibrations, table of, 274 



Vince 



