. CONTENTS 
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V' 7 
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No. XIII. 
Page 
Art. I. On the Chemical Composition of some Minerals of the 
Zeolite Family ; with an Account of two new Sub- 
stances, Mesole and Mesoline. In a Letter to Dr 
Brewster from M. Berzelius, - - 1 
IT. Observations on the Relation between the Optical Struc- 
ture and the Chemical Composition of the Apophyl- 
lite and other Minerals of the Zeolite Family, in refe- 
rence to the preceding Analyses of M. Berzelius. 
By David Brewster, LL.D. F.R. S. L. &. Sec. R.S.E. 12 
III. Observations on Sir Robert Sepping’s Plan for the Cir- 
cular Sterns of Ships of War. By George Harvey, 
Esq. Member of the London Astronomical Society, 19 
IV. Account of Professor Reinward r’s Journey through 
the Preanger Regencies of Java, - - 28 
V. History of the Invention of Pendulum Clocks by Chris- 
tian Huygens. By J. H. Van Swinden, Councillor 
of State, Prof, of Nat. Philosophy at Amsterdam, &c. 
(Concluded from Vol. VI. p. 218.) - - 35 
VI. New Inquiries into the Laws which are observed in 
the Distribution of Vegetable Forms. By Baron 
Alexander Humboldt. (Continued from Vol. VI. 
p.289.) - - - - 47 
VII. Notice respecting Roman? Vessels found in Scotland on 
the Estates of Sir John Hay, Bart. - - 55 
VIII. Some Account of those Manuscripts in Great Britain, 
which contain the Greek Text of the Mathematical 
Collections of Pappus. By S. P. Rigaud, Esq. M. A. 
F. R. S. Savilian Professor of Geometry, and Professor 
of Experimental Philosophy in the University of Ox- 
ford, &c. &c. Communicated by the Author, 56 
IX. Remarks on the Columnar Structure of Trap-Rocks. 
By C. Daubeny, M. D. M. G. S. Communicated 
by the Author, - - - 64 
X. Analysis of Tutenag, or the White Copper of China. 
By Andrew Fyfe, M. D. Lecturer on Chemistry, 
Edinburgh, &c. - - - - 69 
