Notices respecting New Books. 5i9 



species are enumerated, among which 818 cryptogamia). The work evinces 

 great care and labour in the author. 



Ahbildungen neuer od. unvollstandig bekannter Amphibien (Figures 

 of new or imperfectly known Amphibia), sketched from living 

 specimens, and accompanied with text by Dr. H.Schlegel, Cura- 

 tor of the Museum of Leyden. Parti. Dusseldorf, 1837. 

 In no branch of natural history are figures more necessary than in Am- 

 phibiology, and those of the present work from their excellence, being drawn 

 and coloured after nature, merit approbation. Most of the numerous and 

 beautiful drawings, executed in India by order of the Dutch government, by 

 Reinwardt, Kuhl, van Hasselt, Boie, and Maclot, are to be given in this 

 work. Great attention will be paid to the anatomical details and natural 

 history of the serpents, a department hitherto rather neglected. The form 

 of the work is that of Temminck's Planches coloriees d'Oiseaux, which 

 it surpasses as to drawing and colouring, and it may be considered as com- 

 pleting the works of Lacep&de, Russel, Neuwied, Bell, Wiegmann, and 

 others. Each part contains ten plates, with text, at a moderate price. 

 Wiegmann's Archiv, Part 4. Berlin. 1837. 



Contents.— A brief view of the history of the development of vegetable 

 organization in the Phanerogamiaj by Dr. M. J. Schleiden. (A transla- 

 tion of this interesting paper will shortly appear in this Journal).— On the 

 generation of Pteroptus Vespertilionis ; by Chr. L. Nitzsch. — A new genus 

 of water-serpents described by J. Tschudi. — Filaria? in the brain of the 

 foetus of a Lizard; by Prof. Rathke. — Contributions to the knowledge of 

 the Trilobitesy with especial regard to their definite number of Members ; 

 by A. Quenstedt. — On the genus Procyon\ by Prof. Wiegmann. — Fossil 

 quadrumana. — Ehrenberg's new discoveries respecting the Bacillaricc (See 

 p. 448 of our present volume). — Notice on the bite of the Moco (Cavia ru- 

 pestris, Neuw., Kerodon, F. Cuvier); by Prof. Wiegmann.— Report en the 

 progress of Zoology during 1836; by Prof. Wiegmann. 

 Poggendorff's Annalen, 1837. Nos. 6 and 7. 



Contents.— On an apparatus for performing Volta's fundamental experi- 

 ments ; by T. Fechner. — On the expansion of dry air between 0° and 100°; 

 by F. Rudberg. — On the oxidation of metals in atmospheric air; by A. v. 

 BonsdorfK — On the calculation of the forms belonging to the tessular system 

 of crystals; by Fr. v. Kobell. — On the crystalline form of Phenakite; byjE. 

 Beyrich. — Description of a Mica-copper ; by F. Benecke. — Analysis of the 

 copper-mica ; by F. Borchers.— Proportional combination of the oxide of 

 silver and oxide of lead ; by F. Wohler. — On the formation of the oil of 

 bitter almonds ; by F. Wohler and J. Liebig.— Proposal for the adoption 

 of a new medicine instead of distilled laurel and bitter almonds water; by 

 F. Wohler and J. Liebig. — On Amy 'gdalic acid and some of its salts ; by F. L. 

 Winkler. — Composition and constitution ofAmygdalic acid; by J. Liebig. — 

 Method of preparing the bicarbonate of Potash ; by Wohler. — On the de- 

 composition of some of the aethereal oils extracted from various Cinna- 

 mons; by G. J. Mulder.— On Marcet's Xanthicoxide ; by Liebig and 

 Wohler. — Additional notices respecting Arsenic and its combinations; by 

 J. F. Simon. — Detection of quicksilver in the saliva voided after the use of 

 the mercurial salivation ; by L. Gmelin. — Solubility of mercurial vapour 

 in water ; by A. Wiggers. — On a new air-pump ; by N. Lowenthal. — In- 

 structions and tables for rendering easy the calculation of the specific gra- 

 vity of gases from observed facts; by Poggendorff.— Experiments on the 

 specific heat of gases and of the air at different pressures; by G. Suermann. 

 — On the specific gravity of sea-water collected at different periods at the 

 same places of the ocean; by J. Childer. — On the Knee press -, by T. 



