282 Reviews — Prehistoric Man in Belgium. 



not in one column only, but the relative thicknesses of each sub- 

 division in columns parallel to the groups and systems and other 

 larger divisions. Thus we have the Upper, Middle, and Lower 

 Lias shown in one column, with the other minor subdivisions of the 

 British rocks ; adjoining this the Lias is coloured as a whole ; in the 

 next column the whole Oolitic series has one colour ; then the Lower 

 Mesozoic period ; then the Mesozoic ; and lastly the Neozoic cycle. 

 The minor subdivisions of the Carboniferous period are shown with 

 their variations in different localities, and some additional notes are 

 given on the margin of the diagram in regard to this and some of the 

 other series of rocks. 



We may unhesitatingly call it the best pictorial table of strata 

 we have seen ; it is a little over four feet in length and not quite 

 two feet in breadth. We consider the essential feature of it, namely, 

 the exhibition of the relative thicknesses of the rocks, as a very im- 

 portant one, especially in a school diagram, as too often exaggerated 

 notions of the importance of a series may be obtained from a con- 

 sideration of its sub-divisions. Thus, to cite a single illustration, 

 but few are aware that the Lower Silurian rocks are thicker than 

 the entire mass of the Secondary strata. Such facts however get 

 fixed in one's mind, by the aid of a Diagram, more easily than by 

 any other means. 



V. — Physical Geogkaphy. By Sydney B. J. Skertchly, F.G.S. 

 8vo., pp. 196. (London : Thomas Murby, 1872.) 



THIS little work, the first of Murby's " Series of Science Manuals," 

 treats the subject of Physical Geography in a simple and ele- 

 mentary way, and yet with a completeness that will render it very 

 useful as a class-book for schools, and as a manual for junior students. 

 There is considerable freshness in the style in which the subject- 

 matter is put before the reader, and some original observations are 

 contained in it. In regard to the adoption of the term " Transtratic," 

 which the author proposes to apply to such springs as return their 

 water to the surface at points more or less distant from the source 

 whence it was derived, we offer a gentle protest against it. It seems 

 to us not sufficiently in accordance with the motto of the work. Utile 

 et dulce ; it sounds harsh, and we should prefer Transmittent, or 

 even Interstralic, as being equally suitable, and as being somewhat 

 more euphonious into the bargain. 



VI. — Phe-historic Man in Belgium. By M. E. Dupont. L'Homme 

 pendant les ages de la Pierre dans les environs de Dinant-sur- 

 Meuse. 2™^- edit. 8vo.pp.250. (Bruxelles: C. Muquardt. 1873.) 



THIS work is devoted to the discussion of the earliest known indi- 

 cations of Man in Belgium, when he was the contemporary of 

 the Mammoth, Hysena, and Cave-bear. Living then by the chase, 

 and inhabiting caves, he has left numerous remains, which form 

 materials for tracing out his history, and show that his manners and 

 customs and industry, taken altogether, were somewhat analogous to 

 those of the Esquimaux of the present day. Finally, M. Dupont 



