Vll 



Upon the Extent of the Expansion and Contraction of Timber in dif- 

 ferent directions relative to the Position of the Medulla of the Tree. 

 By Thomas Andrew Knight, Esq. F.R.S page 73 



Observations on the Temperature of the Ocean and Atmosphere, and 

 on the Density of Sea-water, made during a Voyage to Ceylon. By 

 John Davy, M.D. F.R.S 73 



Observations on the Genus Ocythoe of Rafinesque, with a Description 

 of a new Species. By William Elford Leach, M.D. F.R.S 75 



The distinguishing Characters between the Ova of the Sepia, and those 

 of the Vermes Testacea, that live in Water, explained. By Sir 

 Everard Home, Bart. V.P.R.S 75 



Astronomical Observations and Experiments tending to investigate 

 the local Arrangement of the Celestial Bodies in Space, and to de- 

 termine the Extent and Condition of the Milky Way. By Sir Wil- 

 liam Herschel, Knt. Guelp. LL.D. F.R.S 76 



Some Account of the Nests of the Java Swallow, and of the Glands 

 that secrete the Mucus of which they are composed. By Sir Everard 

 Home, Bart. V.P.R.S 77 



Observations on the Hirudo complanata, and Hirudo stagnalis, now 

 formed into a distinct Genus under the name, Glossopora. By Dr. 

 Johnson, of Bristol 78 



Observations on the Gastric Glands of the human Stomach, and the 

 Contraction which takes place in that Viscus. By Sir Everard 

 Home, Bart. V.P.R.S 79 



On the Parallax of the fixed Stars. By John Pond, Esq. F.R.S 79 



1818. 



On the great Strength given to Ships of War by the application of 

 Diagonal Braces. By Robert Seppings, Esq. F.R.S page 80 



A Memoir on the Geography of the North-eastern part of Asia, and 

 on the Question whether Asia and America are contiguous, or are 

 separated by the Sea. By Captain James Burney, F.R.S 81 



Additional Facts respecting the Fossil Remains of an Animal, on the 

 subject of which two Papers have been printed in the Philosophical 

 Transactions, showing that the Bones of the Sternum resemble those 

 of the Ornithorhynchus paradoxus. By Sir Everard Home, Bart. 

 V.P.R.S 82 



An Account of Experiments for determining the Length of the Pen- 

 dulum vibrating Seconds in the Latitude of London. By Captain 

 Henry Kater, F.R.S 83 



On the Length of the French Metre estimated in parts of the English 

 Standard. By Captain Henry Kater, F.R.S 85 



A few Facts relative to the Colouring Matters of some Vegetables. By 

 James Smithson, Esq. F.R.S 86 



Account of Experiments made on the Strength of Materials. By 

 George Rennie, jun. Esq 87 



On the Office of the Heart Wood of Trees. By T. A. Knight, Esq. 

 F.R.S. . 88 



