Scotland and Ireland are nearly equal to each other in area, 

 and together are equal to England and Wales : wherefore 

 the population of Scotland being 1,600,000, averages at 55 

 to a square mile ; and the population of Ireland being about 

 4,250,000, averages at 146 to a square British mile. The 

 United Kingdom averages at 130 to a square mile, inclu- 

 ding about 4/0,000 soldiers and sailors.. 



'N. B. The area of a square statute mile is to the area of 

 a square geographical mile as three to four. 



XXXV. Notice respecting New Books. 



The Philosophical Transaction s for 1804. Part I, 208 Pages, 

 with Five Plates. 



T 



•*■ he contents are : 1. The Bakerian Lecture, Experiments 

 and Calculations relative to Physical Optics $ by Thomas 

 Young, M.D. F.R. S. — 2. Continuation Qf an Account of 

 a peculiar Arrangement in the Arteries distributed on the 

 Muscles of slow moving Animals, &c. ; in a Letter from 

 Mr. Anthony Carlisle to John Symmons, Esq. F. R.S. — 

 3. An Account of a Curious Phenomenon observed on the 

 Glaciers of Chamouny ; together with some occasional Ob- 

 servations concerning the Propagation of Heat in Fluids ; 

 hy Benjamin Count Rumford, V. P. R.S. Foreign Associate 

 of the National Institute of France, &c.&x. — 4. Descrip- 

 tion of a triple Sulphuret of Lead, Antimony, and Copper, 

 from Cornwall ; with some Observations upon the various 

 Modes of Attraction which influence the Formation of Mi- 

 neral Substances, and upon the. different Kinds of Sulphuret 



of 



