CONTENTS. r 



JUNE, 1808. 



Engravings of the following Objects: 1, 2, 3. Draining of the Pond of Citis: 

 4^ A'enite, a new Mineral Substance : 5. Mr. Hardy's Compensation Balance. 



I. Observations on such Luminous Phenomena in the Atmosphere, as^ippearto 

 depend on Electricity. By a Correspondent, (R. B.) - - 81 



II. Account of the Draining of the Pond of Citis - - 88 



III. Remarks on some Pseudomorphoses observed in the Substances, that form 

 Fart of the Mineralogical Collection of the Council of Mines. By Mr. Ton- 

 nelier. Keeper of the Mineralogical Cabinet to the Council - 93 



IV. An Experiment on Soap-Suds as a Manure. By Mr. G. Irwin of Taunton ; 

 with Remarks by the Eev. Thomas Falconer - . - 99 



V. An Inquiry into the Causes of the Decay of Wood, snd the Means of pre- 

 venting It. ' By C. H. Parry, M. D. ' - - - 102 



VI. Analysis of Jade; read to the Society of Natural History and Philosophy 

 at Geneva, Dec. 5, 1805. By Theodore de Saussure - 104 



VII. Remarkable Fact of an Increase of Temperature produced in Water bj 

 Agitation. In a Letter from Joseph Reade, M. D. - Jif 



VIII. Further Remarks on Professor Vince's Answer. By a Correspondent ri4 



JX. Ca:lculation of the Rate of Expansion of a supposed Lunar Atmosphere, 

 By a Correspondent - - - - - in 



X. Experiments on Molybdena. By Christian Frederick Bucholz. Translated 

 from the German - - - - - 121 



XI. Construction of a Curb affording a Compensation for the Effects of Heat 

 and Cold in Time-pieces. By Mr. V/illiam Hardy, No. 29, Cold-bath 

 Square - - - ^ _ _ jgg 



XII. Of the Yenite, a new Mineral Substance. By Mr. le Lievre, Member 

 of the Institute, Counsellor of Mines, &c. - - 139 



Xin. Memoir on the reciprocal Action of several \^)!atile Oils and certain Sa- 

 line Substances. By Mr. Margueron, late Apothecary-major to the Hotel 

 des Invalides - - - - - 145 



XIV. Analysis of the Schist that accompanies the Menilite near Paris* By 

 Prof. Lampadius - - - - - 155 



Scientific News - - - - - . 157 



Afeteorological Journal - - - - - igo 



JULY, 



