BOTANY. 121 



gests that possibly it could be avoided by giving the plants a weak 

 solution of phosphate of potash. He quotes articles in which similar 

 recommendations have been made elsewhere. 



Report of the botanist, C. F. Wheeler (Michigan Sta. Rpt. 1S96, pp. 133-135). — 

 The author gives a brief summary of the work carried on during the year, the lines 

 of investigation being seed testing, plant diseases, herbarium work, and weed 

 studies. Among the new weeds are reported the bladder ketmia (Hibiscus trionum), 

 winged pigweed (Cyeloloma platyphylla), and tumbling mustard (Sisymbrium altissi- 

 mum). Of these the latter two are liable to prove troublesome. 



Report of the department of botany and forestry, W. J. Beal (Michigan State 

 Bd. Agr. Rpt. 1S9G, pp. 501, 502). — A tabular statement is given showing additions to 

 the herbarium and museum during the past year. 



Plant protection against animals (I. mezzi di difesa delle pidnte contro gli animali. 

 Naples: Geremicca, 1897, pp. 43). 



The preparation and use in class of certain cryptogamic material, M. A. Bar- 

 ber (Kansas Univ. Quart., 7 (1898), No. 2, pp. 111-113). 



Elements of scientific botany, J. Wiesner (Elemente der wissenschaftlichen Bota- 

 nik. Vienna: Alfred Holder, 1898, vol. 1, pp. VIII, + 372, figs. 159).— This volume treats 

 of the anatomy and physiology of plants. 



"What is Alinit ? J. STOKLASA(Ann.Agron., 24 (1898), No. 4, pp. 171-174).— Taken in 

 part from Chem. Ztg., 1898, No. 20, pp. 181, 182. 



Investigations of the bacteria in Alinit, A. Stutzer and R. Hartleb (Centbl. 

 Bakt. u. Par , 2. Alt., 4 (1898), Nos. 1, pp. 31-39; 2, pp. 73-77).— Studies are reported on 

 the morphology and physiology of Bacillus ellenbachensis alpha. 



Alinit ( Deut. Landw. I'resse., 25 (1898), No. 22, p. 243). 



On a new generic type of Schizomycetes, E. Roze (Compt. Rend. Acad. Sci. Paris, 

 126 (1898), No. 11, pp. 858, 859) . 



Pathological notes, M. Molliard (Rev. Gen. Bot., 10 (1898), No. Ill, pp. 87-101, 

 pi. l,figs. 6). — Notes are given on the proliferation of the flowers of Bromns erectus 

 caused by Ustilago bromirora ; on the action of U. longissima on the floral structures of 

 Glyceria aquatica ; on a parasitic dimorphism of Pteris aquilina; and on morpholog- 

 ical changes in Symplocos due to Exobasidium symploci. 



The behavior of the kinoplasm and nucleolus in the division of the pollen 

 mother cells of Asclepias cornuti, W. C. Stevens (Kansas Univ. Quart., 7 (1S98), 

 No. 2, pp. 77-85, pl.l). 



Chlorophyll and its derivatives, F. G. Kohl (Bot. Centbl., 73 (1898), No. 12, 

 pp. 417-426). 



Can isolated chlorophyll grains separate oxygen in the light? L. Kny (Bot. 

 Centbl., 73 (1898), No. 12, pp. 426-439). 



Observations of stomata by a new method, F. Darwin (Proc. Cambridge Phil. 

 Soc., 9, No. 6, pp. 303-308; abs. in Bot. Centbl., 73 (1898), No. 12, pp. 452-454). 



Studies of extra-floral nectaries, V. A. Poulsen ( Vidensk. Meddel. Naturh. Form- 

 ing. Ejobenhavn, 1897, pp. 356-371, pis. 3 ; abs. in Bot. Centbl., 73 (189S), No. 12, 

 pp. 454, 455). 



Anatomy and physiology of plants arranged for secondary classes, A. 

 Daguillon (Anatomie et physiologie vege'tales, a V usage des ele'ves secondaire classique. 

 Paris, 1898, pp. 279, figs. 253). 



Morphology and biology of the unicellular algae, K. Bohltn (Of vers. K. Sren*k<< 

 Vetensk. Akad. Forhandl. (1897), No. 9, pp. 507-529, figs. 10). — A preliminary contribu- 

 tion to the knowledge of the subject. 



Contributions to the knowledge of nyctrotropic movements, L. Just (Jahrb. 

 Wise. Bot. IPringsheini], 31 (1898), No. 3, pp, 345-390, figs. 2). 



The role of water in growth, C. B. Davenport (Proc. Boston Soc. Nat. Hist., 28 

 (1898), No. 3, pp. 73-84). 



