136 . Analysis of Scientific Books. 



III. Philosophical Transactions of the Royal Society of London, for 

 the Year 1824. Part I. 



The following papers are printed in this Part of the Philosophi- 

 cal Transactions : 



1. The Croonian Lecture. On the internal structure of the Human Brain, 

 ■when examined in the microscope, as compared with that of Fishes, Insects, 

 and Worms. By Sir Everard Home, Bart., V.P. U.S. 



2. Some Observations on the Migration of Birds. By the late Edward 

 Jenner, M.D.,F.U.S. 



3. On the nature of the Acid and Saline matters usually existing in the Sto- 

 machs of Animals By William Prout, M.D.,F.R,S. 



4. On the North Polar Distacces of the principal Fixed Stars. By John 

 Brinkley, D.D,.F.R.S., &;c., Andrew's Professor of Astronomy in the University 

 of Dublin. 



5. On the Figure requisite to maintain the equilibrium of a homogeneous 

 Fluid Mass that revolves upon an Axis. By James Ivory, A.M., F.RS. 



6. On the Corrosion of Copper Sheeting by Sea Water, and on methods of 

 preventing this eflect: and on their application to Ships of War and other 

 Ships. By Sir Humphry Davy, Bart. P. R.S. 



7. A finite and exact Expression for the Refraction of an Atmosphere nearly 

 resembling tiiat of the Earth. By Thomas Young, M.D , For. Sec. R.S. 



8. The Bakerian Lecture. On certain motions produced in Fluid Con- 

 ductors when transmitting the Electric Current. By J. F. W. Herschell, Esq., 

 F.R.S. 



9. Experiments and Observations on the development of Magnetical Pro- 

 perties in Steel and Iron by percussion : Part II. By William Scoresby, Jun. 

 F.R S.E., S(r., Communicated by Sir Humphry Davy, Bart., P. R.S. 



10. On Semi-decussation of the Optic Nerves. By William Hyde Wollas- 

 ton,M.D., V.P.R.S. 



Our readers will find in the abstractor the proceedings of the 

 Royal Society, given in our last Number (Vol. XVII. p. 250,) an 

 account of ail the Papers published in the present half volume of 

 these Trunsactioiis, with the exception of the three first on the list, 

 to which we shall now beg their attention. 



At the commencement of the Croonian Lecture, Sir Everard Home 

 very justly observes upon the impropriety of limiting our inquiries 

 into the cause of IMuscular Motion to the structure of the muscle 

 itself, and points out the necessity of examining the strticture of 

 the brain and nerves in reference to the principle upon which mus- 

 cular motion depends. After adverting to his former communica- 

 tions upon this subject, registered in the Philosophical Transactions, 

 the author proposes in the present Lecture to compare the anatomy 

 of the human brain with that of fishes, insects, and worms. He 

 first describes the brain of the tench, from an annexed representa- 

 tion of which it appears to exhibit less medullary and cortical 

 mat'ter, in proportion to the size of the animal than that of the 

 bird ; its form is also less compact, being made up of spherical 

 nodules, medullary on the surface, and internally cortical ; its 

 basis is nodulated, and in the centre is an oval cavity. 



Entering upon the anatomy of the brain of insects and worms, 



