TABLE OF CONTENTS 



TO THIS TWELFTH VOLUME. 



E: 



SEPTEMBER, 1805. 



NGRAVINGS of the following Objects: 1 . New Apparatus for raifij>g 

 Water above its Level by the Syphon., by Mr. Clofe j 2. Furnace for bending 

 Wood j 3, 4. Two Plates of the Machine for producing a Blait by a Shower* 

 of Water palling down a perpendicular Pipe. 



I. Letter from Davies Giddy, Efq. M. P. defcribing a lingular Fact of the invi- 

 fibleEmiffion of Steam and Smoke together from the Chimney of a Furnace; 

 though either of them, if feparately emitted, is vifible as ufual. Page 1 



II. On a Meteoric Stone that fell in the Neighbourhood of Sigena, in Arragon, 

 in 1773, by Profeflbr Proud. - - - . - 2 



III. Farther Remarks on Mechanic Power, in Reply to Mr. J. C. Horn- 

 blower. In a Letter from Mr. O. Gregory, Royal Mil. Academy. 7 



IV. Defcription" and Effects of an Apparatus for rain ng Water by Means of. 

 Air condenfed in its Defcent through an inverted "Syphon^ By Mr. William 

 Clofe. From the Inventor. - - - - 1Q 



V. Remarks on Count Rumford's Experiments relating to the Maximum Den- 

 fity of Water. In a Letter from Mr. John Dal ton. - - !>S 



VI. On the Art of bending Wood. By J. H. HafTenfratz. - - 30 



VII. Experiments made in the great, in a reverberating Furnace on Caft Iron, 

 confirming the eftablhried Theory reflecting the Difference between caft and 

 malleable Iron. By G. A Lampadius, Prof, of Chemiitry and Metallurgy 

 at Freyberg. - - - - - - - 34 



VIII. Remarks on the burfting of two Mufquet Barrels by a Charge of Gun- 

 powder confined by Sand. W.N. v - - - 40 



IX. Report of a Method of meafuring the initial Velocity of Projectiles dif- 

 charged from Fire-arms, both horizontally and with different Elevations, 

 made to the Phyfical and Mathematical Clafs of the National Inftitute by Mr. 

 Prony, Dec. 11, 1803. Abridged from the Original. - - 41 



X. Fact, concerning the invifible Emiffion of Steam into the Air. W.N. 47 



XI. Experiments made with the Water blowing Machines of the Iron Works of 

 Poullaouen ; by Citizens Beaunier and Gallois, Mine-Engineers. - 48 



XII. A Method of rendering the long and fhort Vibrations of a Balance, 

 governed by a fpiral Spring, precii'ely equal in Duration. By Mr. Charles 

 Young. In a Letter from. the Inventor. - • >- - 56 



Scientific News, 58. — Compofition of Muriatic Acid, ib. — Literary and Philo- 

 'fophical Society of Newcaftle upon Tyne, 60. — New Procefs for fteeping 

 Hemp, 61. — Medical Theatre, St. Bartholomew's Hofpital, ib. — Medical 

 Inftitution, 62. — Properties of blued Steel not generally known, 63.— Pre- 

 servation of fucculent Plants, 64. 

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OCTOBER 



