Organization. 24. How to make Eatable Food 

 from Wood, . . 374-77 



STATISTICS. 



25. Extent and Population of Great Britain and her 

 Colonies. 26. Concerning the Probability of 

 Human Life in Glasgow ; by James Clelland, 

 LL.D. . . . 377-78 



XIX. New Publications, . . 380 



1. Bibliographia Palaeonthologica Animalium Syste- 



matica. Auctore G. F. de Waldheim, ib. 



2. Outlines of Comparative Anatomy. By Dr Grant, 



Professor of Comparative Anotomy and Zoology, 

 London University. Pai't 1st, Osteology, Liga- 

 ments, and Muscles. Illustrated with 65 Wood 

 Cuts, ... ib. 



3. Aide-Memoire du Voyageur, ou Questions relatives 



a la Physique et Politique ; a I'lndustrie et aux 

 Beaux- Arts, <vc. A 1' Usage des Personnes qui 

 veulent utiliser leur Voyages. Par Jac. R. Jack- 

 son, . . . ib. 



4. Exposition of the Principles of Mr James Lang's 



invention for Spinning Hemp into Rope-yarns by 

 Machinery, and its effect on the Strength and Du- 

 rability of Cordage. By Macnab & Co. Green- 

 ock, ... ib. 



5. Lethsea Geognostica ; or Figures and Descriptions 



of the characteristic Petrifactions of the different 

 Rock Formations. By Dr H. G. Brown, 382 



XX. Proceedings of the Royal Society of Edinburgh, 383 



XXI. Proceedings of the Wernerian Natural History So- 

 ciety, . . 389 



XXII. Proceedings of the Society for the Encouragement 



of the Useful Arts in Scotland, . 398 



Account of Artificial Felspar, by Professor Kersten — 

 Crystals of Oxide of Chrome — Phosphate of Lime 

 in the Teeth, and Silica in the Skin, of the Infuso- 

 ria, ... 400 

 Index, . . . 401 



