11 
CONTENTS, 
JUNE, 1813 . 
Engravings of the following subjects : 1. Dissections of the Parts of Trees, 
By Mrs. Agnes I bbef son. 2. Mr. Telford’s Method proposed to Parlia- 
ment of building Bridges, without having recourse to supports between 
the Buttresses for the centering. 
I. — -Discussion on the Cause of the Figure of a Man, which was formed in 
the Ice of the Pond in Hainaker Park. In a Letter from Mr. Robert 
Harrup, - - - - - 81 
II. ---On the effects of Twenty Thousand Zinc and silver Plates, arranged as 
an Electric Column. By Mr. George John Singer, Lecturer on Experi- 
mental Philosophy. - - - 84 
III. -— On the Wood and Bark of Trees much magnified. By Mrs. Agnes 
Ibbetson. - 8/ 
IV. — Inquiries relative to the Structure of Wood, the specific Gravity of its 
solid Parts, and the Quantity of Liquids and elastic Fluids contained in it 
under various Circumstances, the Quantity of Charcoal to be obtained 
from it j and the quantity of heat produced by its Combustion. By Count 
Rumford, F. R. S. Foreign Associate of the Imperial Institute of France, 
&c, (Concluded from page 335 , vol. xxxiv.) - Q5 
V. — - A Mode of producing intense Heat. By M. H. B. - Ilf 
VI. — -An explanatory Statement of the Notions or Principles upon which 
the systematic Arrangement is founded, which was adopted as the Basis of 
an Essay on Chemical Nomenclature. By Professor J. Berzelius. (Con- 
tinued from p. 4f of the present volume.) - - 11S 
VII. — Meteorological Journal. - - - - 132 
VIII. — On the conducting Power of Bodies for Electricity, and the Effect of 
Points. By R. B* - - - - - 134 
Scientific News. - - - - - 139 
JULY. 
