ii 
CONTENTS. 
Art. VII. On the Utility of Contour Lines on Plans. By 
Captain VeETCH, feel ae i With a 
Plate, 
VIII. Remarks on the eeere and reer of the 
IX. 
XI. 
XII. 
XIII. 
XIV. 
XV. 
Moveable-Derrick Crane, improved and intro- 
duced into general use by WiLL1AM WIGHTMAN, 
Contractor, in the year 1837; but more parti- 
cularly as applicable in the Construction of 
Bridges, Piers, Breakwaters, and Naval Archi- 
tecture. Communicated to Ed. New Phil. Jour- 
nal by the Royal Scottish a of Arts. With 
a Plate, 
Abstract of a Paper relative to Soring of Water. 
By Rozert Were Fox, 
. Account of a Cheap and Portable Self Registering 
Tide-Gauge, invented by Joun Woop, Esq. of 
Port-Glasgow, and which has been two years in 
use. With examples of the work done by it. By 
Joun Scott Russet, Esq., F.R.S.E., F.R.S.S.A. 
Communicated by the Royal Scottish Society 
of Arts. With a Plate, : 
Researches on the Situation of Zones without 
Rain, and of Deserts. By M. J. Fourner, Pro- 
fessor in the Faculty of Sciences of Lyons. Con- 
cluded from Vol. xxxvii., p. 375, 
An Account of Electrical Experiments. By Mr 
R. Avis, Liverpool. Communicated by the 
Author, F . : 
On Fireproof Warehouses. By Witiiam Farr- 
BAIRN, Esq., Civil-Engineer, 
On Fluorine in Recent and Fossil Bones, and the 
sources from whence it is derived. By J. Mip- 
DLETON, Esq., 
Contributions towards Establishing the General 
Character of the Fossil Plants of the genus Si- 
gillaria. By Wiii1am Kine, Esq., Curator of 
the Museum of the Natural History Society of 
Northumberland, Durham, and Newcastle-upon- 
Tyne. With Two Plates. Communicated by 
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