ii CONTENTS. 



OCTOBER 1S05. 



Engravings of .the following Objecls : 1, 2. Apparatus for Analyfing Vege- 

 table Soils* by H. Davy, Efq. Profeffor of Chemiftry at the Royal Inftitu- 

 tion ; 3. Diagrams to explain the Do6irine of Heat, communicated by Count 

 Rumford. 



I. Experimental Investigations concerning Heat. By Benjamin Count of Rum- 

 ford, V. P. R. S. Foreign Affociate of the National Inftitute of France, 

 &c. &c. Received from the Author. - - - Page 65 



II. On pure Nickel, difcovered to be one of the noble Metals, and on its 

 Preparation and Properties. By J. B. Richter. - - ' - 75 



III. On the Analyfis of Soils, as connected with their Improvement. Bv 

 Humphrey Davy, El'q. F. R. S. Profeffor of Chemiftry to the Board of 

 Agriculture and to the Royal Inftitution. - - - 81 



IV. Difcovery of a new Vegetable Subftance, by Mi\ Rofe. - 91 



V. New Galvanic Difcoveries by Mr. Ritter, extracted from a Letter from Mr. 

 Chrift. Bernoulli. - - - - - <?9 



VI. Improvement in applying the Points in Electrical Machines. By Mr. G. 

 J. Singer. - .-.-.,_ 103 



VII. Queftion whether light as a Body may not have its Temperature raifed or 

 lowered, and produce the Effecls afcribed to reflecUd Heat. By J. P. 10* 



VIII. Experiments on a Mineral formerly called falfe Turjgftein, now Cerite, 

 in which a new Metal has been found. - - - 105 



IX. Abftraft of a Memoir, entitled Confiderations en Colours, and feveral of 

 their lingular Appearances j read at the Clafs of Mathematical and Physi- 

 cal Sciences cf the National Inftitute, March, 1805, by C. A. Prieur. M2 



X. Report made by the Phyfical and Mathematical Clafs of the Inftitute, 

 in Anfwer to the Queftion, whether thofe Manufactories, from which a 

 difagreeable Smell arifes, may prove injurious to Health. Read in the Sit- 

 ting of January, 1805, by Meffrs. Guyton-Morveau and Chaptal. 122 



XI. Faels relative to the torpid State of the North American Alligator. By 

 Benjamin Smith Barton, M. D. - - - 131 



XII. Obfervations and Experiments on the conducting Power of Fluids. By 

 T. S. Traill, M. D. From the Author. - - - 133 



XIII. Indian Account of a remarkably ftrong and ferocious Beaft, which (they 

 fay) exifted in the northern Parts of the State of New Ytnk about two hun- 

 dred Years ago. Col'iecled and communicated by Mr. John Heckewelder. l$9 



Scientific News, &c. 142. — Aftronomical Prize, ib.-~ New Muftcal Inftrument, 

 jb. — Saverien, 143. — Pure and beautiful Cerufe, ib. — Chromate of Lead and 

 of Silver, 144. — Putrefaction prevented, ib.— Leveiian Mufeum, ib. 



NOVEMBER 



