376 Notices respccling New Books. 



Sec. R.S.— 16. On the Nature and Combinations of a newly- 

 discovored vegetable Acid ; with Observations on the malic 

 Add, and Suggestions on the State in whicli Acids may have 

 previously existed in Vegetables. By M. Donovan, Esq. Com- 

 municated by W. H. Wollaston, M.D. Sec. R.S. — 16. On the 

 Structure of the Organs of Respiration in Animals which appear 

 to hold an intermediate Place between those of the Class Pisces 

 and the Class Vermes, and in two Genera of the last mentioned 

 Class. By Sir Everard Home, Bart. V.P.R.S.— IJ. On the 

 Mode of Generation of the Lamprev and Mvxine. By Sir 

 Everard Ilcmie, Bart. V.P.R.S. — IS. On the Multiplication of 

 Images, and the Colours which accomj)aiiv them in some Speci- 

 mens of calcareous Spar. By David Brewster, LL.D. F.R.S. 

 Lond. and Edin. In a Letter addressed to the Right Hon. Sir 

 Joseph Banks, Bart. G.C.B. P.R.S. — 19. A Series of Observa- 

 tions of the Satellites of the Georgian Planet, including a Passage 

 through the Node of their Orbits ; with an introductory Account 

 of the telescopic Apparatus that has been used on this Occasion; 

 and a final Exposition of some calculated Particulars deduced 

 from the Observations. By William Herschel, LL.D. F.R.S. — 

 20. An Account of some Experiments with a large Voltaic Bat- 

 tery. By J. G. Children, Esq. F.R.S. — 21. On the dispersive 

 Power of the Atmosphere, and its Effect on astronomical Obser- 

 vations. By Stephen Lee, Clerk and Librarian to the Royal 

 Society. Communicated by W. H. Wollaston, M.D. Sec. R.S. 

 — 22. Determination of the North Polar Distances and proper 

 Motion of Thirty fixed Stars. By John Pond, Esq. Astronomer 

 Royal, F.R.S. — 23. An Essay towards the Calculus of Func- 

 tions. By C. Babbage, Esq. Communicated by W. H. Wol- 

 laston, M.D. Sec. R.S. — Some additional Experiments and 

 Observations on the Relation which subsists between the nervous 

 and sanguiferous S\stems. By A. P.Wilson Philip, Physician 

 in Worcester. Communicated by T. Andrew Knight, Esq. 

 F.R.S. 



jdn Account of the most important recent Discoveries and Iw- 

 provtments in Chemistry and Mineralogy to the present 

 Time ; being an Jlppendix to their Dictionary of Chemistry 

 and Mineralogy . By A. and C. R. Aikin. J to. 



The title of this work sufficiently explains its object; and it 

 is but justice to say that the authors have not merely " endea- 

 voured to give," but have succeeded in exhibiting " a perspi- 

 cuous and sufficiently detailed account of the various and highly 

 important discoveries Vy which the science has been enriched 

 during the ^!e\\ years that have elapsed since the publication of 

 their former volumes." 



As 



