ISO THE .TOUUXAL OF I30T.VXY 



Moumouili^liirp, "by Mr. S. Hninilton, pnl)lished at NeAvport (Mon.) 

 in 1909, Avhich is" not, we think, generally known. It might have 

 been hoped that the autlior would have enriched his book by notes 

 which he must have accumulated during his many years of field work, 

 but this Avould have entailed a much larger book with its attendant 

 difficulties. 



The Flora is well printed, but the numbers attached to the 

 species, if indeed they are required, should have been differentiated 

 from those of the districts by different type. The absence of an 

 index mio-ht have been partially atoned for had some indication been 

 given in the page-headings of the Orders immediately beneath them ; 

 but this is not supplied. 



The Geography of Plants. By M. E. Hahdt, D.Sc. Oxford, 

 Clarendon Press. Pp. i-xii, 1-327; tigs. 115. 7s. Qd. net. 



This attractive-looking volume is the "more advanced book" 

 promised in the author's Introduction to Plant Geography, and is, 

 as the preface states, "in some sort an expansion of Part III. " of 

 that work. The brief account of the continents there given has 

 formed the basis of the book before us, and has been enlarged into a 

 full discussion of the conditions in which plants flourish, and their 

 distribution in the great geographical divisions of the earth. 



The work comprises seven chapters; the first six deal each with a 

 continent, in this order — Asia, North America, South America, Aus- 

 tralia, Africa, Europe — Britain coming last for treatment. A final 

 chapter of half a dozen pages is devoted to a "Conclusion"; and 

 the book finishes with two excellent indexes, one geographical, the 

 other a " Piant In lex." 



The print and paper are excellent — a welcome change from so 

 manv b )oks that have been produced under war-conditions. The 

 abunlant figures, many of them fuU-p.-ige, comjn-ise reproductions 

 from photographs, which, considei'ing their size (the book is but 

 crown octavo), are remarkable for their clearness, and sketch-maps of 

 the various continents illustrating rainfall, mean temperature, physical 

 features, and vegetational distribution. 



The subject is treated fundamentally from a geograi)hical point 

 of view, as the arrangement of the chapters indicates; the book, in 

 fact, is one of a series — " The Oxford Geographies." Stress is laid 

 throughout upon the analogies of vegetation In the different divisions 

 of the globe ; the author is to be congratulated upon his lucid 

 exposition of these analogies — for exam}:)le the Mediterranean types, 

 the equatorial forests of the tropical belt, and so on — and the 

 illustrations are particularly w^ll-chosen to aid his exposition. 



In the endeavour to trace the " true homology of the plant-forms 

 and communities" (to use the author's own words) he has not been 

 so successful. The general problem involves the four considerations 

 of (T) previous history; (2) process of adjustment; (3) time during 

 which this process has been in operation ; and (4) the gradual 

 evolution of physical conditions. It woidd seem that the space at 

 Dr. Hardy's dis]X)sal has proved altogether insufficient for the task 



