A FLORA OF NORFOLK 109 



many more, including some about whom information is badly 

 wanted, which should have appeared in the roll-call of botanists 

 which we expect to find in a local flora. We also miss the descrip- 

 tive and critical notes which often lend more than a local value to 

 works such as this, and which indicate observation of a higher 

 type than that which a mere record conveys. 



We note the presence of a considerable number of names in 

 local use, and the omission of the more absurd of the " book- 

 names " which — e.g., in Carex — often disfigure books of this 

 class. We are glad, too, that all the names, whether Latin or 

 English, are placed in one index. Nor must we omit to mention 

 what is evidently a very full and careful list of Mosses and Liver- 

 worts prepared by Mr. W. H. Burrell, with the assistance of 

 Mr. H. N. Dixon ; the Fungi are altogether omitted. There are 

 two excellent maps. 



It will be seen from what has been said that we have in Mr. 

 Nicholson's book a solid though not an exciting contribution to our 

 knowledge of British local botany — a knowledge the gaps in which 

 are being steadily filled up. 



Pflanzenphysiologie : Versuche unci Beohachtungen an hoheren und 

 niederen Pjianzen einschlusslich Bacteriologie und Hydro- 

 hiologiemitPlanktonkunde. By K. Kolkwitz. Jena: Gustav 

 Fischer. Pp. 258. 12 coloured plates, 116 text figures. 

 9 Mark. 

 The present work has grown from the author's Pflanzeri- 

 physiologische Versuchen zu Ubimgen im Winter, published in 1899, 

 and is a course of physiology arranged for the students of 

 the Berlin University and the Agricultural Academy. The first 

 part, consisting of sixty pages, deals with the nutrition of the 

 higher plants — chlorophyll and its functions, turgidity and os- 

 mosis, sugar and reserve food material, proteins, respiration, water 

 and air. The experiments are well-devised, though most of them 

 are familiar ; the exposition is clear and reference is made to 

 recent literature. The principal part of the book deals with 

 Cryptogams. After a description of the microscope and its acces- 

 sories, the various phyla are considered in order, beginning with 

 the Myxomycetes and ending with the Ferns. Much of the 

 matter cannot be said to be physiological in the ordinarily accepted 

 sense of the term. Methods of collection, culture, and examina- 

 tion, as well as a description of the habitat, are given where 

 possible. The physiological significance of various processes in 

 the life-history is well described in many instances. The most 

 interesting portion of the book is the section " Algen, Plankton 

 und Okologie der Gewiisser," as was to be expected, seeing that the 

 author is a recognized authority in hydrobiology. The short 

 descriptions of many plants might have been left out with advan- 

 tage. In some cases the cryptogams so treated are commonly 

 met with in the neighbourhood of Berlin (and of London) and 

 might therefore claim place, but Sargassum, Macrocystis, &c., 

 seem out of place in such a book. This portion of the work would 



