30 BOTANICAL NEWS. 



There are thirteen of those types taken in the book : — 1, Yeast ; 

 2 Protococcus ]iluvialis ; 3, Proteus animalcule (AmcoVja) and colour- 

 less blood corpuscles; 4, Bacteria; 5, Moulds (l*enicillium and 

 T^rucor) ; 6, Stoncworts (Chara and Nitella) ; 7, Pleris aquilma ; 

 8, Vicia Faha; 9, Bell-Animalcule (Vorticella) ; 10, Freshwater 

 Polyps (Hydra viridis and H. fusca) ; 11, Freshwater Mussel (Ano- 

 donta cygnca) ; 12, Freshwater Crayfish (Astacus fluviatilis) and 

 Lobster (Homarus vulgaris); 13, Frog. Under each chapter we find 

 first a short but comprehensive description of the plant or animal, an I 

 following this a tabular arrangement of the " Laboratory Work," 

 briefly pointing out the organs and structures requiring notice, and 

 the best method of treatment to exhibit them and their nature and 

 relations to the best advantage. There can be no doubt of the excel- 

 lence of this method of instruction, it commends itself, aiul has besides 

 been proved to result in a clear and definite knowledge of quite a 

 difterent kind to that derived from merely hearing or reading. To 

 science-teachers who wish to follow out so complete a system of 

 instruction this " Course " cannot fail to be of the greatest assistance. 



H.T. 



Manuals of Elementary Science — Botany. By Prof. Bentley. Lon- 

 don : Society for Promoting Christian Knowledge. 1875. 

 (12mo, pp. 128.) 

 This is intended as a very elementary and simple introduction to 

 the study of plants. Its scope is limited to the organography of 

 Phanerogams, and is especially adapted as an introduction to the Rev. 

 C. A. Johns* " Flowers of the Field." The matter is to a considerable 

 extent an outline of the author's well-known " Manual of Botany," and 

 the treatment presents no special features for comment, save that at the 

 end of each chapter is a series of questions on the preceding text. The 

 low price (a shilling) of this little book, which is illustrated with 131 

 woodcuts, is likely to bring it into many hands where larger treatises 

 would never come. H. T. 



25otantcal S!ic\xs^, 



Articles its Journals. 



Annates des Sc. Naturelles (ser. G, vol. i.). — P. van Tioghem, " New 

 researches in the Mucorini" (t. 1-4). — E. Prillieux, "On the for- 

 mation of the gum of fruit-trees" (t. 5, 6). — U. Gayon. "On the 

 role of microscopic beings in the change of organic substances. 1. The 

 spontaneous putrefaction of eggs" (t. 7). — B. Renault, "On the 

 silicified plants of Autun and St. Etienne, Botryopten's'' (t.8-13). — 

 A. Mayer and A. de Wolkoff", " Researches on the respiration of 

 plants." — A. Brongniart, " Observations on the Pandancte of New 

 Caledonia" (t. 14, 15).— J. Duval-Jouve, "Histology of the leaves of 

 Grasses" (t. 16-18).— G. Thuret (the late), "On the classification 

 of the Nostochincay — P. van Tieghem, "On the specific gravity and 



