CONTENTS. 



Obscn'ations upon the Ccuhnia fotind at the Ana-am Iron-Woiks 



in Columbia Counti;^ Nexv York, erroneoxisly supposed to he a 



ncxo Mineral, ^j/ Wm. H. Keating . . . . . 115 



On a Planetary Analogy ; or a Lavo of Motion pervading and 



connecting all the Planetary Orbits. By Mr. J. Utting 119 



State of the TJicrmoineter at Smyrna for civvy Day in the 



Year \S'20. Co?nmnnicated by Dr. T.Yohster. . . 121 



Notice of the Fusion of Plumhago, or Graphite, {commonly 



called Black Lead,) by Professor ^w.-u.^ihim . . . . 124- 



Experiments upon Diamond, Anthracite, and Plumbago, 'with 



the compound Bloxi:pipe : by Pjofessor SiL'LiMA-tJ . . 131 



A Nexv Plan of Tunnelling, calculated for opening a Roadxvay 



under the Thames. By M. J. Brunel, Esq. C.E. F.R.S. 1 39 



List of the Occultations of the Fixed Stars. By M. Inghirami 



161, 278,378 

 On Cadmium. JSj/ William Herapath, JSs*/. . . . 166 

 On the Transformation of Functions. By Mr. P. Nicholson 



168 



On the Changes "which have taken place in the Declination of 



some of the princijml Fixed Stars. By John Pond, Esq. 



Astronomer Roycd, F.R.S. 175 



Chemical Researches by Z)/-. Friedebiann Gobel of Jena 187 



On the Identity of certain General Laws which have been 



observed to regulate the Natural Distribi/fion of Insects and 



Fungi. By W. S. MacLeay, Esq. M.A. F.L.S. 192, 255 



A /ho Observations on the Natural Dist7-ibution of animated 



Nature 200, 27* 



On the Firing of Gunpowder by Fidminating Merctiry. By 



Mr. E. G. Wright 203 



Experiments on the Development of Electricity by Pressure ; 

 — Laxcs of this Development. By M. Becouerel 204, 263 

 On the Nature of the Curves described by one of the Combina- 

 tions o/'Jopling's Apparatus. By Mr. T. Tredgold 21 1 



Mr. J. Utting on a Planetary Analogy 214 



On the Construction of an Air Barometer. By Mr. Henry 



Meikle 214 



Complete DescrijHion of Erlan, a new Mineral. By Au- 

 gustus Breithaupt a7id C. G. Gmelin ... 241 

 Derivative Analysis. By Mr.V. Nicholson 244, 348, 433 

 On the Destroyers of the Trees in St. James's Park . . 252 

 An easy Method of reducing Sidereal into Mean Time. By 



Dr. T. L. Tiarks 280 



Note on the Property which some Metals possess (f facilitating 

 the Combination of Elastic Fluids. By MM. Dulong and 



Thexard 282 



Ort^cF.iJE Reiner's Experiment. By W. Herapath, Esq. 2S6 



