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XXXI. Notices respecting New Books. 



1 he Second Part of the Philosophical Transactions has 

 msde its appearance. The following are its contents : 



12. Observations of a Comet, made with a View to in- 

 vestigate its Magnitude and the Nature of its Illumination. 

 To which is added, an Account of a new Irregularity lately 

 perceived in the apparent Figure of the planet Saturn. By 

 William Herschel, LL.D. F.R.S. — 13. Hydraulic Investi- 

 gations, subservient to an intended Croonian Lecture on the 

 Motion of the Blood. By Thomas Young, M.D. For. Sec. 

 R.S. — 14. A Letter on the Alterations that have taken place 

 in the Structure of Rocks, on the Surface of the basaltic 

 Country in the Counties of Derry and Antrim. Addressed 

 to Humphry Davy, Esq., Sec. R.S. By William Richard- 

 son, D.D. — 15. A Letter on the Differences in the Struc- 

 ture of Calculi, which arise from their being formed in diffe- 

 rent Parts of the urinary Passages ; and on the Effects that 

 are produced on them, by the internal Use of solvent Medi- 

 cines, from Mr. William Brande, to Everard Home, Esq., 

 F.R.S. — 16. Some Observations on Mr. Brande's Paper on. 

 Calculi. By Everard Home, Esq., F.R.S. — 17. On the 

 Changes produced in Atmospheric Air, and Oxygen Gas, 

 by Respiration. By W. Allen, Esq., F.R.S., and W. H. 

 Pepys, Esq., F.R.S. — 18. Description of an Apparatus for 

 the Analysis of the Compound Inflammahle Gases by slow 

 Combustion ; with Experiments on the Gas from Coal, ex- 

 plaining its Application. By William Henry, M.D., Vice- 

 Pres. of the Lit. and Phil. Society, and Physician to the In- 

 firmary, at Manchester. Communicated by Humphry Davy, 

 Esq., Sec. R.S. — 19. An Account of some Peculiarities in 

 the anatomical Structure of the Wombat, with Observations 

 on the Female Organs of Generation. By Everard Home, 

 Esq., F.R.S. — 20. On the Origin and Office of the Albur- 

 num of Trees. In a Letter from T. A. Knight, Esq., F.R.S. 

 to Sir Joseph Banks, Bart., K.B., P.R.S.— 21. Eclipses of 

 the Satellites of Jupiter, observed by John Goldingham, 

 Esq., F.R.S., and under his Superintendance_, at Madras, 



M 3 in 



