50 Notices respecting Neiv Books. 



" The relations of the two specimens of Ports-Down and High- 

 Down are exceedingly simple, and their history extremely well dis- 

 played. The opposing dip, contortion, and form of both eminences, 

 are satisfactory proof of their protrusion from the parent stratum 

 below ; — whether effected by a separate and distinct propelling im- 

 pulse, or simply by arrest, by the interposition of some opposing sub- 

 stance, during the subsidence of the main body, it is not now material 

 to inquire. The mass thus detached and elevated, a part of which 

 forms Ports-Down, must have been covered, as some portion of it 

 still is, by the overlying strata, and is an outlier only where its 

 highest parts have been exposed to the denuding forces. 



** No line of country exists, indicative of any connexion between 

 Ports-Down and High-Down, which are twenty-four miles asunder. 



" It belongs to the general history of chalk-basins, and would 

 pass the limits prescribed to this research, to endeavour to show 

 which of the actions above referred to, have produced these out- 

 liers. Either way, they tend powerfully to illustrate the theoreti- 

 cal parts of the foregoing Essay, and to prove the disruption and 

 displacement of the chalk, — the act of basining, — posterior to the 

 deposit of the higher strata. 



" The Isle of Thanet is probably an outlier of this description, and 

 the writer is informed that Windsor stands upon chalk, which must 

 therefore be also an outlier-by-protrusion, and perhaps so also the 

 chalk islands in the Paris basin. 



" It will be easily seen, that it is not necessary that such outliers 

 should have a dip and an inclination opposite to the main body. 

 In the elevation of the former, or the subsidence of the latter, they 

 may both preserve the same parallelism, or nearly similar relations 

 to the horizontal line. It is enough, if it be proved, that they are 

 out of the direct line with each other below ; and that the detached 

 portions have been exposed to the flood of denudation upon the 

 surface, and are outliers where they have been elevated within the 

 range of the denuding force." [ B. ] 



Elements of Chemistry. By Andrew Fyfe, M D. F.R.S.E. &c. 1827. 



In the Philosophical Magazine for November last we offered some 

 observations on Dr. Fyfe's f* Manual of Chemistry," without any an- 

 ticipation that it would so soon fall to our lot to notice two octavo 

 volumes on the same subject by the same author. We presume that 

 the success which has attended Dr. Fyfe's first work, has stimulated 

 him to fresh exertion ; and we have with no slight attention examined 

 nearly the whole of the work now under consideration, in the hope 

 of being able to give a more favourable opinion of it, than that to 

 which we conceived the Manual was entitled. 



We shall not occupy either our own time or that of the reader with 

 a minute examination of the arrangement adopted in the present 

 work : it is materially altered from that of the Manual 5 and we do not 

 perceive that the change is accompanied with the improvement, for 

 which there was so ample room. The Elements commence with the 

 subject of Heat, while in the Manual, and in our opinion with better 



judgement, 



