CONTENTS. 



Page 

 Art. r. Biographical Memoir of James Watt, one of the 

 Eight Foreign Associates of the Academy of 

 Sciences. By M. Arago, Perpetual Secretary, 221 



Childhood and youth of James Watt ; his appointment as 

 Instrument-maker to the Uuivei-sity of Glasgow, 222 



History of the Steam-Engine, . . 230 



Copying Press — Heating hy Steam — The Composition of 

 Water — Bleaching by means of Chlorine — Experiments 

 upon the Physiological Eifects resulting from the Respi- 

 ration of various Gases, . . . 265 



Watt in Retirement — Details respecting his Life and Cha- 

 racter — His Death — The numerous Statues erected to 

 his Memory — Reflections, . . . 278 



II. On Machinery considered in Relation to the Pros- 

 perity of the Working Classes. By M. Arago, '297 



III. Additional Notes to M. Arago's Memoir of James 



Watt, ..... 310 



IV. Historical Account of the Discovery of tlie Compo- 



sition of Water. By tlie Right Hon. Henry 

 Lord Brougham, F.R.S., and Monihcr of the 

 National Institnto of France, 'ild 



