ii 
CONTENTS. 
Art. IX. Description of a Hydrometrograph, or a Machine for 
Measuring and Recording the Quantity of Water, 
or any other Fluid, discharged within a given 
time from Conduit Pipes. Invented by the Che- 
valier Joseph de Baader, of Munich, in the King- 
dom of Bavaria. Communicated by the Inventor. 
(With a Plate). - - 271 
X. Account of the Ancient Canal from the Nile to the 
Red Sea. By Charles Maclaren, Esq. With 
a Map and Section. - - - 274? 
XL Discourse on the History and Progress of Geology, 
delivered by Professor Necker, at the Meeting 
of the Magistrates and Teachers which takes 
place annually at Geneva, on the occasion of dis- 
tributing the Prizes to the successful Candidates. 
(Concluded from Vol. XII. p. 328.), - 292 
XII. Observations on the Temperature of Man and other 
Animals. By John Davy, M.D. F.R.S. 300 
I. Of the Variable Temperature of Man, - 301 
II. Of the Temperature of different Races of Men, 305 
XIII. On the Effects of Mildew on Canvas, and Notice of 
the Experiments of Mr Sanderson of Leith on 
this important subject, - - 312 
XIV. Some Remarks respecting the U tility of Chain Cables. 
In a Letter from Captain Basil Hall, F.R.S. to 
Professor Jameson, - - - 31 6 
XV. Results of some Experiments made at Liverpool, on 
Sir H. Davy’s Method of protecting the Copper- 
Sheathing of Ships. Communicated by T. S. 
Traill, M. D. &c. &c. - - 326 
XVI. Observations and Experiments on the Structure and 
Functions of the Sponge. By Robert Edmond 
Grant, M.D. F.R.S.E. F.L.S. M.W.S. &c. (Con- 
tinued from p. 107*) - 343 
XVIL On Water as a Moving Power for Machinery. By 
C. Carmichael, Esq. Engineer, Dundee, 346 
XVIII. Description of a New Patent Steam Coach, invented 
by Messrs Timothy Bdrstall and John Hill, 
Engineers. Communicated by the Patentees. 349 
XIX. On the Formation of Ores by the Action of the At- 
mosphere and of Volcanic Heat, - 352 
