TABLE OF CONTENTS 



TO THIS FOURTH VOLUME. 



JANUARY 1803. 



JlLnGRAVINGS of the following Objects: 1. A new Aiding Stop for Air' 

 Pumps, and other Pneumatic Ufes; 2. A fimple and fecure Metallic Joint. for 

 Tubes; 3. Mr. Harriott's Syphon Engine for raifing and lowering Weights, 

 and other Ufeful Purpofes. 



L On the Nature of the Grave Harmonics. In a Letter from Mr. John 

 Gough. - - - - V ' .. V* " Page 1 



II. Bagatelles relating to the Pneumatic Apparatus. Sliding Stop-cock j fimple 

 and fecure metallic Joint for Tubes; Improvement of Read's Apparatus; 

 original Invention of Woulfe's Bottle6 and Tubes ; and of a Method of 

 clofing Veflels. ByNN. - - - - - 4 



III. Analyfis of Corundum, and of fome of the Subftances which accompany 

 it; with Obfervations on the Affinities which the Earths have been fuppofed 

 to havejfor each other in the humid Way. By Richard Chenevix, Efq. F. R. S. 

 and M.R. I. A. From the Philofophical Tranfaaions for 1802. - 7 



IV. A Ivtemoir on the Mufical Sounds produced in Tubes by Hidrogen Gas. 

 ■ Read to the Society of Philofophy and Natural Hiftory at Geneva. By G. 



peiarive. - - - - - - - 23 



V. Account of a fimple Method of eftimating the Changes of Volume produced 

 in Gafes, by Alterations of Temperature, and of Atmofpheric PrefTure, in the 

 Courfe of Chemical Experiments. By Mr. H. Davy, Profeffor of Chemiftry 

 at the Royal Inftitution. From their Journal. 32 



VI. Obfervations on Sir George Shuckburgh Evelyns Paper in the Philofophical 

 Tranfaaions for 1798, oh the Standard of Weight and Meafure. By J. 

 Fletcher, E,fq. Communicated by the Author. 35 



VII. On the Quantities of Light afforded by Candles in Proportion to the Con- 

 sumption of Material, and other Objeas refpeaing the fame. In a Letter 

 from Mr. Ez. Walker. -----. 40 



VIII. Description of an Engine for raifing and lowering Weights by the Aaioa 

 of a Column of Water, and for other Purpofes. By John Harriott, Efq. 44- 



IX. On the Elearicity of the Shavings of Wood. By Mr. W. Wilfon. 49 



X. On the Compofition of Emery. By Smithfon Tennant, Efq. F.R. S. 53 



XI. Experiments and Obfervations on the Power of Fluids to condua Heat; 

 with Reference to Count Rumford's Seventh EiTay on the fame Subjea. By 

 John Dalton. ------- 5S 



Scientific News, Account of Books, &c. — Leaurefhip on Subjeas of Natural and 

 Experimental Philofophy, at Newcaftle upon Tyne — On a new Kind of Mortar 

 called Plaifter Cement — Note concerning two Brothers of a Race of men re- 

 fembling Porcupines — The Mineralogy of Derbyshire, with a Defcription of 

 the molt interefting Mines in the North of England, in Scotland, and in Wales; 

 and an Analyfis of Mifs Williams's Work, entitled, " The Mineral King- 

 dom." Subjoined is a Gloffary of the Terms and Phrafes ufed by Miners in 

 Derbyfhire— An Enquiry into the Caufes of the Error* and Irregularities 

 which take place in afcertaining the Strength of Spirituous Liquors, by the 

 Hydrometer, with a Demonftration of the Praaicability of Amplifying and 

 rendering this Inftrument accurate, - - - ' . 59 to 63 



Vol. IV.— 1803, 9 FEBRUARY 



