226 Analyses of Books, [Sept. 



He also imagines that volcanos may be among the means, 

 that nature employs for increasing the extent of dry land, in 

 proportion to that of the ocean, a notion rendered more probable, 

 oy considering, that coral reefs are mostly founded upon shoals 

 caused by volcanic eruptions. 



'* Hence a sort of consistency will appear, in this case, to exist 

 in the arrangements of nature, which leads to the belief that fire 

 and water are both working together to a common end, and that 

 end the preparation of a larger portion of the earth's surface for 

 the maintenance of the higher orders of animals.** 



The additional notes relate to a subterraneous noise heard 

 near the Red Sea; to the origin of the fables respecting the 

 'fyphon orTyphoeus of the Greeks, which seem to be often meant 

 as allegorical representations of volcanic phsenomena ; to the 

 revolutions of opinion that have taken place with respect to 

 geological theories ; and to some other topics. 



The whole concludes with a list of books, from which inform- 

 ation may be gathered as to the different volcanos, mentioned in 

 the course of the work. 



The volume is illustrated with several wood-cuts, giving sec- 

 tions, &c. of geological phsenomena, bya copper-plate engraving 

 2lf Jorullo, as represented by Humboldt, and by two maps, the 

 one of Mexico, the other of a part of Judea, illustrative of the 

 author's views with respect to the formation of the Dead Sea. ' 



l^hilosophical Transactions of the Royal Society of London, for 

 1826. Parts I. and II. 



{Concluded from ^. 141.) 



Xn. On the Nervous Circle which connects the Volant a^y 

 ■Muscles with the Brain ; by G. Bell, Esq. communicated by the 

 President. 



The principal results of the investigation detailed In this 

 paper, are contained in the following extracts : 



" I hope now to demonstrate — that where nerves of different 

 functions take their origin apart and run a different course ; two 

 nerves must unite in the muscles, in order to perfect the relations 

 betwixt the brain and these muscles, 



" It may be in the recollection of the Society, that my first 

 paper showed the difference of the nerves of the face ; by divid- 

 ing one nerve, sensation was destroyed, whilst motion remained; 

 and by dividing the other, motion was stopped, whilst sensibility 

 remained entire. 



" Other parts of the nervous system since that time have 

 engaged my attention ; and it is only now that I am able to 

 inAe full use of the facts announced in my first paper, which 

 were indeed expected to lead to further improvement of our 

 knowledge of the animal ceconomy. When I distinguished the 



