XXII 



Corrections to the Reductions of Lieut. Foster's Observations on Atmo- 

 spherical Refractions at Port Bowen : with Addenda to the Table 

 of Magnetic Intensities at the same Place. By Lieut. Henry Fos- 

 ter, R.N. F.R.S page 308 



Corrections of an Error in a Paper published in the Philosophical 

 Transactions, entitled, " On the Parallax of the Fixed Stars." By 

 J. F. W. Herschel, Esq. F.R.S 308 



c On a new Form of the Differential Thermometer, with some of its Ap- 

 plications. By William Ritchie, A. M 309 



On the Structure and Use of the Submaxillary Odoriferous Gland in 

 the Genus Crocodilus. By Thomas Bell, Esq. F.L.S. G.S 309 



On the Permeability of Transparent Screens of extreme Tenuity by ra- 

 diant Heat. By William Ritchie, A.M 310 



On the Derangements of certain Transit Instruments by the Effects of 

 Temperature. By Robert Woodhouse, A.M. F.R.S. &c 311 



On some of the Compounds of Chromium. By Thomas Thomson, 

 M.D. F.R.S.L.&E 313 



Rules and Principles for determining the dispersive Ratio of Glass ; 

 and for computing the Radii of Curvature for achromatic Object- 

 Glasses, submitted to the Test of Experiment. By Peter Barlow, 

 Esq. F.R.S. ..; 316 



On the Change in the Plumage of some Hen-Pheasants. By William 

 Yarrell, Esq. F.L.S 317 



On the secondary Deflections produced in a Magnetized Needle by an 

 Iron Shell, in consequence of an unequal Distribution of Magnetism 

 in its two Branches. First noticed by Captain J. P. Wilson, of the 

 Honourable East India Company's Ship Hythe. By Peter Barlow, 

 Esq. F.R.S 318 



On the Difference of Meridians of the Royal Observatories of Green- 

 wich and Paris. By Thomas Henderson, Esq 319 



Some Observations on the Effects of dividing the Nerves of the Lungs, 

 and subjecting the latter to the Influence of voltaic Electricity. By 

 A. P. W. Philip, M.D. F.R.S. L.&E 320 



On the Effects produced upon the Air Cells of the Lungs when the 

 Pulmonary Circulation is too much increased. By Sir Everard Home, 

 Bart. V.P.R.S 321 



. Theory of the Diurnal Variation of the Magnetic Needle, illustrated 



by Experiments. By S. H. Christie, Esq. M.A. F.R.S. 321 



f> On the ultimate Composition of simple alimentary Substances ; with 

 some preliminary Remarks on the Analysis of organized Bodies in 

 general. By William Prout, M.D. F.R.S. 324 



1828. 



Experiments to ascertain the Ratio of the Magnetic Forces acting on 

 a Needle suspended horizontally, in Paris and in London. By Cap- 

 tain Edward Sabine, Sec. R.S page 326 



. On the Resistance of Fluids to Bodies passing through them. By 



James Walker, Esq. F.R.S.E !. 327 



