FNGRAVINGS of the following Objects: 1. Mr. Bofwell's Improvements in the Hydraulic Engines at Schemnitz, of Mr. Goodwyn, and that which acts 1. Improvements in the Hydraulic Engine of Schemnitz, and in that of Mr. Goodwyn; with comparative Remarks on the moft ufeful Applications of each, and fome Facts relative to the Invention of the preffure Engine. In a V. On Bradley's Method of obferving Tr nfits, and another Method by which the Thicknefs of the Wire is ren tered of no Importance. In 2 VII. A Continuation of the Experiments and Obfervations on the Light which is fpontaneoufly emitted from various Bodies; with fome Experiments and Obiervations on Solar Light, when imbibed by Canton's Phosphorus. By IX. Obfervations in Anfwer to Dr. Priestley's Memoir in Defence of the Doctrine of Phlogiston. In a Letter from Mr. William Cruickshanks. XI. Defcription of a very cheap Engine for railing Water. In a Letter from Mr. H. Sarjeant, of Whitehaven, to Mr. Taylor, Secretary to the Society XII. Concerning the Indentity of Teilurium and Antimony, the galvanic Effects of Magnetilim, and other Philofophical Subjects. By a Correfpon- JUNE 1802. Engravings of the following Objects: 1. Strong framed Levers for Steam En gines, by Mr. J. C. Hornblower, and others; 2. Diagrams by Dr. Young, to explain the Nature and Properties of Light; 3, 4. Figure by Mr. Gregory to demonftrate Mr. Pearfon's Analogy for deducing the greatest Equation from the Eccentricity: and another by Mr. Gough, for fhewing how we perceive the direction of Sound. And, 5. A new Lamp by Meffis. Carcel and Carreau, in which the Oil is raised mechanically. 1. On the Rev. Mr. Pearfen's Analogy for deducing the greatest - Equation from the Eccentricity. In a Letter from Mr. Olinthus Gregory. Page 65 II. On the Conftruction of the Beams of Steam Engines. By Mr. J. C. Hornblower. From the Author. 68 III. On the Theory of Chemistry. In a Letter from the Rev. J. Prieftley, L. L. D. F. R. S: &c. 69 IV. Experiments upon the tanning Principle, and Reflections upon the Art of Tanning. By Cit. Merat Guillot, Apothecary at Auxerre. 70 V. On the Deftruction of the Grub of the Cock-chafer. By Edward Jones, Efq. of Wepre-Hall, in Flintshire. 73 VI. Methods of diminishing the Irregularities of Time-Pieces, arifing from differences in the Arc cf Vibration of the Pendulum. By M. Ezekiel Walker. 76 78 VII. On the Theory of Light and Colours. By Thomas Young, M. D. 92 IX. A Continuation of the Experiments and Obfervations on the Light which is fpontaneously emitted from various Bodies; with fome Experiments and Obfervations on folar Light, when imbibed by Canton's Phosphorus. By Nathaniel Hulme, M. D. F. R. S. and A. S. (Concluded from page 40.) 100 X. Defcription of a Lamp upon Argand's Principle, with Improvements, in which the Oil is maintained at the fame Level by the conftant Action of a Pump. By Citizens Carcel and Carreau 108 114 XI. Note upon a peculiar vegetable Principle contained in Coffee. By Richard Chenevix, Eq. F.R. S. M. R. Í. A. From the Author. XII. Account of fome Experiments performed upon a Scale of confiderable Magnitude, and principally by the Agency of Froft, to produce Sulphate of Soda, Carbonate of Magnelia, and Muriate of Ammonia, from Sulphate of Magnelia, Carbonate of Ammonia, and Muriate of Soda. By H. Campbell, M. D. From the Author. XIII. Note of Citizen Vauquelin refpecting the Boracite, called Magnefio-calcareous Borate by the French Chemifts. 120 XIV. Facts and Obfervations tending to explain the curious Phenomenon of Ventriloquifm. By Mr. John Gough. 122 129 138 XV. An Analysis of a Mineral Substance from North America, containing a Metal hitherto unknown. By Charles Hatchett, Esq. XVI. Remarks on the Mamoth. By Lou's Valentine, Phyfician in Chief of the Army and Hofpitals of America, of feverai National and Foreign Societics, refident in Nancy. Scientific News. Prizes of the National Inftitute of France-Aftronomical Prize-Communications to the Royal Society refpecting the Planet Ceres→→ Leonardo da Vinci-Experiments to prove that all Bodies, whatever may be their Nature, are obedient to the Action of Ma-net:lin, ard that this Action is utficiently powerful to auinitor unine némile 141 to 143 JULY Engravings of the following Objects: 1. A new Apparatus for heating Water to nearly the boiling Point by Means of Waste Steam, by Mr. Arthur Woolf; 2. An improved Mill, by Mr. G. Terry; 3. Mr. Bullock's Drawback Lock; 4. Chrystals of Anhydrous Sulphate, by the Count de Bournon; 5. Application of a temporary Forcer, by Mr. Trevithick; 6. Lachenaie's Apparatus for claying Sugars. 1. Compofition of Writing Ink, poffeffing the permanent Colour, and other effential Properties, of the Ink ufed for Printing. In a Letter from Mr. William Clofe. Page 145 II. Of the Effects produced by the Vegetation of Plants in Atmospherical Air. 150 III. On the Theory of Light and Colours. By Thomas Young, M. D. F. R. S. Profeffor of Natural Philofophy in the Royal Institution. 162 IV. An Analysis of a Mineral Subftance from North America, containing a Metal hitherto unknown. By Charles Hatchett, Efq. 176 181 V. On the Effect of Sound upon the Barometer. By Sir Henry C. Englefield, 184 VII. A new Procefs for claying Sugars, propofed by Cit. Haffel Lachenaie, Chief Apothecary of the Military Hofpitals of Guadaloupe, to the Agents of the Confuls of the French Republic in the Windward Islands. 187 VIII. Defcription of the Crystalline Forms of the Anhydrous Sulphate of Lime, with fome Obfervations on this Substance. By M. Le Comte de Bournon, Member of the Royal and Linnean Societies of London. Tranflated from the Original; communicated by the Author. 190 IX. Analysis of Natural and Artificial Anhydrous Sulphate of Lime. By Rich. Chenevix, Efq. F. R. S. M. R. I. A. Communicated by the Author. 196 198 X. Abridgment of a Memoir of Mr. Prouft, on Tanin and its Species. XI. Defcription of an Apparatus for heating Water by wafte Steam. Invented by Mr. Arthur Woolf. 203 XII. Defcription of an improved Drawback Lock for House Doors. By Mr. Wm. Bullock. From the Tranfactions of the Society of Arts, who adjudg ed a Reward of Fifteen Gummeas to the Inventor. 204 XIII. Defcription of an improved Mill for grinding hard Subftances. By Mr. Garnett Terry. From the Tranfactions of the Society of Arts, who adjudged the Silver Medal to the Inventor. 206 XIV. Remarks on Dr. Thomson's Theory of Combuftion. By C. P. (Received June 15, 1802.) ib. 212 213 XV. On certain Points of Nomenclature. By a Correfpondent. XVI. Duplicate Copy of a Letter from Baron de Zach to the Right Honourable Sir Jofeph Banks, Bart. P. R. S. &c. tranfmitted to Mr. Edw. Troughton, and communicated by the Rev. J. Pearfon; on the new Planet Ceres and Pallas, with the Elements of the Orbit of the former. XVII. Method of applying a temporary Forcer to a Pump, fo as to produce a conftant Stream. By Mr. Richard Trevithick. From the Author. 216 XVIII. Experiments and Obfervations on certain ftony and metalline Subftances, which at different Times are faid to have fallen on the Earth; alfo on various Kinds of native Iron. By Edward Howard, Efq. F. R. S. From the Philofophical Tranfactions, 1802. ib. Scientific News. Dimenfions and Nature of the new Planets Ceres and Pallas. By Dr. Herfchel-Extract of a Letter from the Rev. James Wilson, D. D. Minister of Falkirk. Account of Books of Science. Memoirs of the Literary and Philofophical Society of Manchester, 221 to 222 223 AUGUST AUGUST 1802. Engravings of the following Objects: 1. Figures to illuftrate Mr. Jamefon's Obfervations on the Formation of Granite; 2. Mr. Banks's Inftruments for determining the Preffures and Velocities of effluent Air or Gas; 3. The Spirit Hydrometer and Scales of Atkins; 4. Compound Condenfers of Electricity, by Mr. Read and Mr. Cuthbertfon. I. On Granite. By Mr. Robert Jamefon. Communicated by the Author. Page 225 11. Obfervations on the Converfion of Iron into Steel. In a Letter from Jofeph Priestley, L. L. D. F. R. S. &c. &c. 233 III. An Account of the Art of making Glue. In a Letter from Mr. John Clennel. 7 235 IV. On the Preparation of Indelible Ink. In a Letter from Mr. Thomas Sheldrake. 237 249 V. Obfervations on the Caufes why a large Quantity of common Salt prevents Putrefaction, and a fmall Quantity haftens it. By D. H. VI. Account of the Methods by which Soda is at prefent prepared for the English Market; with other Obfervations. By Mr. Fred. Accum. From the Author. 241 VII. Comparison of the French definitive Metre with an English Standard, brought from London by M. A. Pictet, one of the Editors of the Bibliothéque Britannique. VIII. On the Figure of Sulphate of Barytes, and the Formation of Mandreporce. In a Letter from Mr. H. Sarjeant. 244 253 IX. Experiments and Observations on certain ftony and metalline Substances, which at different Times are faid to have fallen on the Earth; alfo on various Kinds of Native Iron. By Edward Howard, Efq. F. R. S. From the Philofophical Transactions. 1802, 254 X. An Answer to Mr. Gough's Effay on the Theory of Compound Sounds. By Thomas Young, M. D. F. R. S. 264 XI. Experiments on the Velocity of Air iffuing out of a Veffel in different Cire cumftances; with the Defcription of an Inftrument to measure the Force of the Blaft in Bellows, &c. By Mr. Banks, Lecturer in Natural Philofophy. XII. On the Variation of Rate in a Time Piece, as indicated by the Changes in the Arc of Vibration.. In a Letter from Mr. Ezekiel Walker. XIII. Defcription of Atkins's Hydrometer for afcertaining the fpecific Gravities of fpirituous Liquors. By J. Fletcher, Efq. Communicated by the 269 273 276 Author. XIV. An Examination of Sig. Volta's Experiments which he calls fundamental, and upon which his Theory of Galvanifm refts; with a Defcription of a very fenfible Electrical Condenfer, and an Explanation of the Action of the Electric Fluid in the Galvanic Inftrument. By John Cuthbertson, Philofophical Inftrument Maker, No. 54. Poland Street, London. Communicated by the Author. XV. Obfervations on the Phosphorescence of the Tremolite, and of the cal careous Phosphate of flow Solution, known by the Name of Dolomie. By M. le Comte de Bournon, Fellow of the Royal and Linnæan Societies Tranflated from the Original; communicated by the Author. 281 290 XVI. Outline of the Hiftory of Galvanifm; with a Theory of the Action of the Galvanic Apparatus. By John Bostock, M. D. From the Author. 296 Improvements in the Hydraulic Engine of SCHEMNITZ, and that of Mr. GoODWYN; with comparative Remarks on the most useful Applications of cach, and fome Facts relative to the Invention of the preffure Engine. In a Letter from Mr. JOHN WHITLEY BOSWELL. SIR, To Mr. NICHOLSON. London, March 14. 1802. HAVING, with much fatisfaction, found that the method Method of of making the Schemnitz hydraulic engine work itself, which working engines by the bucket I gave you for your excellent Journal in 1800, (IV. 117.) and fyphon. has been fince found of confiderable utility in * other works of a fimilar nature, I am induced to fend for your approbation a draft of the + application of the fame principle to Mr. Good * Vide Mr. Clofe's papers in the fame Vol. †The paper figned L in the quarto Journal, page 343, though it profeffes to fhew how Mr. Goodwyn's engine may work itself, has only hinted at this method, but has not fhewn how it may be effected. VOL. II.-MAY, 1802. B wyn's |