CONTENTS 
(f 
X ' 
tS:i7x 
U3 
OF 
No. V. 
Peg€ 
Art. I. On Isothermal Lines, and the Distribution of Heat over 
the Globe. By Baron Alexander de Humboldt, I 
II. On the Antiseptic Power of the Pyrolignous Acid. By 
Mr William Ramsay. Communicated by the Au- 
thor, - - - 21 
III. On the Length of the Pendulum, in reply to a Letter 
contained in No. XVL of the “ Quarterly Journal of 
Science.'* By William Watts, Esq. - 27 
IV. Account of a Map of the Route between Tartary and - 
Amarapura, by an Ambassador from the Court of Av^a 
to the Emperor of China. By F rancis Hamilton, 
M. D. F. R. S. & F. A. S. Lond. & Edin. Communi- 
cated by the Author, - 32 
V. On the bed of the German Ocean, or North Sea. By 
Robert Stevenson, Esq. F. R. S. E. & M. W. S. Ci- 
vil Engineer. Communicated by the Author, 42 
VI. Account of Mr Edward Nairne's Process of Artificial 
Drying and Freezing by the Air-Pump, - 56 
VII. Account of the Flexible Water-Main, contrived by the 
late Mr Watt, for the Glasgow Water- work Company. 
By John Robison, Esq. F. R. S. E. &:c. in a Letter to 
Dr Brewster, - - - 60 
VIII. Account of the Subterranean Temple of Ipsambul. By 
Lieutenant-Colonel Straton. Communicated by the 
Author, - - - 62 
IX. Observations respecting the Vision of the Humble-Bee 
and the Honey-Bee. By Sir G. S. Mackenzie, Bait. 
F. R. S. Lond. & Edin., &c. &c. In a Letter to Dr 
Brewster, - - - 67 
X. On Vanishing Fractious. By Mr WilLiajr GAL^RA^TH. 
Communicated by the Author, - 69 
