THE 



EDINBURGH NEW 

 PHILOSOPHICAL JOURNAL, 



On the Temperature of the Frith of Forth, and on the Specific 

 Gravity/ of its Water. By John Davy, M.D., F.R.S., Lon. 

 and Ed., Inspector-General of Army Hospitals, L.R. (Com- 

 municated by the Author.) 



When my attention was first directed to the subject ot in- 

 quiry announced in the heading of this notice, it was my de- 

 sign to have carried on froni month to month a regular series 

 of observations on the temperature of the sea of the Frith of 

 Forth, and on the specific gravity of its water, with the ex- 

 pectation that the results collected for two or three years might 

 be of some value, and especially in connexion with the climate 

 of the coast of Scotland and its islands. 



Interrupted in this design by leaving Edinburgh, the obser- 

 vations I have now to offer are few in number, reaching only 

 from September 1842 to last April ; few, however, as they 

 are, I would hope that they may not be altogether useless, 

 and sure I am, they will not be so, should they lead to more 

 extended inquiry. 



The temperature of the sea, as given in the following table, 

 was ascertained by immersing a thermometer, the scale of 

 which had been carefully corrected, in the water at the head 

 of Leith Pier, or, as on two occasions marked by an asterisk, 

 when the sea was too rough to make the observations there, 

 at the stairs close to the Lighthouse ; and the water, the spe- 

 cific gravity of which is given, was taken up at the same time 

 and places. 



VOL. XXXVI. NO. LXXI. JAN. 1844. A 



