CONTENTS 



OF 



THE QUARTERLY JOURNAL, 



N". XXI. 



ART. PAGE 



I. On the Forms of Mineralogical Hammers. By J. Mac 



CuLLOCH, M.D., F.R.S., (with Wood-Cuts) 1 



n. Geological Description of Barbadoes, with a Coloured 



Map of the Island. By James D. Maycock, M.D. 10 



in. Account of the Remains of a Mammoth, found near 

 Rochester ; with some general Observations connected 

 with the Subject. By Captain Vetch, of the Royal 

 Engineers, M.G.S., with a Plate 20 



IV. Observations on the Solar Eclipse, Sept. 7, 1820. By 



J. L. Memes, Esq., with Plates 26 



V. Account of a Coloured Circle surrounding the Zenith. 



By Mr. Thomas Taylor, Jun 40 



VI. Some additional Observations relating to the Secreting 

 Power of Animals, in a Letter to the Editor. By 



A. P. Wilson Philip, M.D., F.R.S.E., &c ib. 



VII. Observations on the Effect of Dividing the Eighth 

 Pair of Nerves, in a Letter to the Editor. By Charles 

 Hastings, M.D., Physician to the Worcester Infirmary 45 



VIII. On Jasper. By Dr. Mac Culloch 63 



IX. A Translation of Rey's Essays on the Calcination of 



Metals, Communicated by John George Chil- 

 dren, Esq., F.R.S., &c 72 



X. Remarks on the Depression of Mercury in Glass Tubes. 83 



XI. Additional Observations respecting the Oil Question. 



By Samuel Parkes, Esq., F.L.S., &c 86 



XII. Proceedings of the Royal Society of London 118 



XIII. Analysis of Scientific Books. 



i. A System of Chemistry, in Four Volumes. By Tho- 

 mas Thomson, M.D.; the Sixth Edition 119 



XIV. Astronomical & Nautical Collections, No. V. 



i. M. Delambre's direct Method of computing the La- 

 titude from Two Observations of the Sun's Altitude, and 

 the Time elapsed between them 172 



ii. Computation of Effect of terrestrial Refraction, in the 

 actual Condition of the Atmosphere 174 



