8, 
14, 
15. 
CONTENTS. 
GEOLOGY. 
On the Depth of the Primeval Seas, afforded 
by the Remains of Colour in Fossil Testacea. 
By Edward Forbes, F.R.S., Pres. G. 8. L. 9. 
On the employment of water in filling up 
deep Bore-Holes in Blasting Operations. 10. 
The American Tunnelling-Machine. 11. Table 
of Statistics respecting the Mississippi, by 
Mr Brown. 12. Age of our Planet. 13. 
Use of Nitrate of Soda as a Fertilizer, 
BOTANY. 
Progress of Flax Cultivation in Ireland. 
GEOGRAPHY. ™ 
Augustus Petermann on the progress of the 
Expedition to Central Africa, by Messrs 
Richardson, Barth, Overweg, and Vogel, in 
the years 1850, 1851, 1852, 1853, 
ZOOLOGY. 
16. On the Identity of Structure of Plants and 
i; 
Animals, by T. H. Huxley, 
MISCELLANEOUS. 
On the Preservation of Buildings. 18. On 
the relative values of different kinds of Meat 
as Food, by Marchal of Calvi. 19. New Ob- 
servatory at Vienna, 
New Publications received, 
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