CONTENTS 
OF THE FIFTY-THIRD VOLUME. 
ON the Nature and Laws of Friction... ie ete 
On Roads and Wheel-Curriages. one 4.6 orate: 
On the Scheme of a Perpetual Full Moon. a SE uoad ¥- 
A Postscript to the Paper“ On the Swallow.” .. ; 16 
On the Manufacture and Uses of Animal Charcoal, Loin by 
the Name of Ivory Black, &c. oe alle 
On new Combinations of Oxygen and Acids. .. Sole 
Description of an Acid Principle Kes sore the Lithic or 
Uric Acid. ae ap ‘ $i o> 
On the Question “ Whether Music is necessary to tie Orator,— 
to what Extent, and how most readily attainable?” 31, 81, 
"oat 
New experimental Researches on some of the leading Doctrines 
of Caloric; particularly on the Relation between the Elasti- 
city, Temper ature, and latent Heat of different Vapours ; and 
on Lhermometric Admeasurement and ean y. 38, 87, 182 
On Specific Heat. P. .. 44 
On Wheel- Carriages and their Bffects usboi Rous. -. 102 
Report of the Surveyor-General of the Board of Works, of the 
Experiments made for the Purpose of ascertaining the Prac- 
ticalility of superseding the Necessity of employing Climbing 
Boys in the sweeping of Chimney Ws ty. Means of the Employ- 
ment of Machinery. .. ent IOS 
New Experiments on the Oxy ae Acids tnd Oxides: 109 
On the Importance of knowing. and accurately discriminatin 
Fossit-Suexcs, as the means of identifying particulor Beds 
of the Srrara, in which they are inclosed: with a List 
of 279 Species or Varieties of ae of which the several 
Vol. 53. No. 254. June 1819. Strati- - 
