378 Analyses of Books, [May, 



the carbonates in the table correspond witli the canon of Berzelius, 

 that the oxygen in the base is either eq.ual to that in the acid or a 

 submuhiple of it by a whole number. It was more likely that this 

 rule would hold with the carbonates than with the sulphates or 

 nitrates, because carbonic acid contains only two atom? of oxygen, 

 and the multiples of this number are much more likely to occur 

 constantly than of three, the number of atoms of oxygen which 

 exist in sulphuric, or five, that of the atoms in nitric acids. 



From the preceding table it appears probable that most of the 

 carbonates have been accurately analyzed, for almost the whole of 

 them agree verv nearly with the numbers contained in the table. 



It follows likewise from this table that 100 grains of carbonic 

 acid combine with a quantity of base containing 36*22 grains of 

 oxvgen, or at most 36-35 of oxygen. If we were to calculate the 

 composition of the carbonates on that supposition, we should obtain 

 results almost coinciding with those given in the table. This I 

 consider as a farther corroboration of the accuracy of the consti- 

 tuents of these salts as here established. 



(To be continued.) 



Article IX. 

 Analyses of Books. 



Philosophical Tra}isactlo72s of ihe Royal Society (f London for 

 the Year 1813, Part 11. 

 • This Part contains the following papers. 



]. An Account of some Organic Remains found near Brentford, 

 Middlesex. By the late Mr. Vv'illiam Kirby Trimmer. These 

 organic remains were dug out of two fields : the first about half a 

 mile north from the Thames at Kew Bridge, the surface of which 

 is about 25 feet higher than the Thames at low water. The beds 

 in this field beginning at the surface are the following : 



Thickness. 



1. Sandy loam 6 to / feet 



2. Sandy gravel A few inches 



3. Loam, slightly calcareous 1 to 5 feet 



4. Peat in small' detached patches A few inches 



5. Gravel containing water 2 to 10 feet 



Thickest under tlie peat. 



6. The London clay '. 200 feet. 



The first bed contains no animal remains; the second contains 

 snail shells, river shells, and a few bones of land animals, so muti- 

 lated that 1 :-.e class to which they belong cannot be ascertained. 

 The third ued contaii^ the horns and bones of the ox, the horns. 



