11 CONTENTS. 



rage 

 Art. XVII. Observations on the Generation of the Lobularia digitata, Lam. 

 (Alcyonium lobatum, Pall.) By R. K. Grant, M. D., F. R. S. E., 

 F. L. S., Professor of Zoology in the University of London. Com- 

 municated by the Author, - .. - 104 

 XVI n. Description of an Apparatus for Impregnating Liquids with Gases. 



By James King, Esq. Commiinicated by the Author, - 110 



XIX. Account of the Assamese Method of Blasting Rocks. Communicated 



by a Correspondent in India, - - - 111 



XX.. Memoir on the Horary Oscillations of the Barometer at Rome. Com- 

 municated by the Author, - - _ - 112 

 XXI. On Footsteps before the Flood, in a Specimen of Red Sandstone. By 



Mr Grierson, - - - - - 130 



XXII. On the Improvements in the Elements of the Moon's Orbit. By M. 

 Le Chevalier Burg, Corresponding Member of the Academy of 

 Sciences, F. R. S. E. &c. &c. In a Letter to Dr Brewster, 134 



XXIII. Excursory Remarks on Radiant Heat, with a short examination of 

 Professor Leslie's Theory. By William Ritchie, A. M. Rector of 

 the Royal Academy at Tain. Communicated by the Author, - 136 

 XXIV. On the Effects of the Poisonous Gases on Vegetables. By^EDWARD 

 Turner, M. D. F. K. S. E. Professor of Chemistry in the University 

 of London ; and Robert Christison, M. D. Professor of Medical 

 Jurisprudence and Police in the University of Edinburgh, &Cw - 140 



XXV. ZOOLOGICAL COLLECTIONS, - - - 149 



1. On the appearance of Locusts in the Doab. By G. Playfair, Esq, ib. 



2. Destructive action of the Teredo navalis on vessels built of Teak Tim- 

 ber. By Mr C. Wilcox, - - - - 151 



3. Destniction of the Piles at the Chain Pier by the Limnoria tere- 

 brans, - .----- 152 



4. On the means by which Spiders that produce Gossamer effect their 

 aerial excursions. By J. Blackwall, Esq. - • 153 



5. On the Fascination of Snakes. By Mr Nash, - - 154 

 V). Experiments on the reproduction of domestic animals. By Mr Ch. 



GiRON DE Buzareurgues, Corresponding Member of the Royal 

 Academy of Sciences, . - - _ . 155 



7. On the Esquimaux Dog. By J. G. Children, Esq. - ib 



8. Elephant, - - - - - 156 



XXVI. HISTORY OF MECHANICAL INVENTIONS AND OF PRO- 

 CESSES AND MATERIALS USED IN THE USEFUL ARTS, 157" 



1. Mr Farey's Improved Lamp, - , - - - ib. 



2. Notice of the New Metallic Compound Artimomantico, resembling 

 gold in colour and weight, - - - ib. 



3. Notice of a Metallic Alloy for plating Iron and protecting it from 

 Rust, - - - - - - ib. 



4. Composition for washing in Sea Water. By Edward Heard, Che- 

 mist, London. ..... 158 



5. Process for giving Statues and Medals the appearance of Bronze, ib. 



6. Account of an improvement in the construction of Bedsteads, Sofas, &c. ib. 



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