CONTENTS 



OF 



THE QUARTERLY JOURNAL, 



No. XXXI. 



ART. p AfiE 



I. On the Theory of the Dead Escapement, and the reducing it to 



practice for Clocks with Seconds and longer Pendulums. By 

 B. L. Vulliamy, Clock-maker to the King 1 



II. Account of the Remains of a Roman Camp at Mitchley, near Bir- 



mingham. By John Finch, Esq 24 



III. Observations on the Project of taking down and rebuilding Lon- 



don Bridge, and on the Design for the New Bridge by the late 

 Mr. Rennie. By a Correspondent 27 



IV. Remarks on the Deposition of Dew. By Geo. Harvey, M.G.S, 35 



V. On Animals preserved in Amber, with Remarks on the Nature 



and Origin of that Substance. By J. Mac Culloch, M.D., 

 F.R.S. . 41 



VI. Lamarck's Genera of Shells. 49 



VII. On an Arenaceo-calcareous Substance found near Delvine in 



Perthshire. By J. Mac Culloch, M.D., F.R.S. . . . 79 



VIII. On the Process of Reproduction of the Members of the Aquatic 



Salamander. By Tweedy J. Todd.M.D., F.R.M.S.E., SfC. 84 



IX. Progress of Foreign Science 67 



