136 Lectures on the Results of the 



VIII. Machines and Tools for Working in Metal, Wood, and 

 other Materials. By the Rev. Robert Willis, M.A., 

 F.R.S., Jacksonian Professor in the University of 

 Cambridge. 



IX. Philosophical Instruments and Processes, as repre- 

 sented in the Great Exhibition. By James Glaisher, 

 Esq., F.R.S. 



X. Civil Engineering and Machinery generally. By 

 Henry Hensman, Esq. 



XI. The Arts and Manufactures of India. By Professor 

 J. F. Royle, M.D., F.R.S. 



XII. On the Progress of Naval Architecture, as indicating 

 the Necessity for Scientific Education, and for the 

 Classification of Ships and Steam-Engines ; also on 

 Life-Boats. By Captain Washington, R.N., F.R.S. 



Of these interesting lectures, the first or leading, viz. the 

 admirable discourse of Dr Whewell, has already appeared 

 in this Journal (vide Vol. lii. No. 103, January 1852, p. 1). 

 It would have afforded us much pleasure to have gone fully 

 into the merits of the other lectures, but our limits prevent 

 this. The following extracts from some of these lectures 

 will, however, we think, enable our readers to judge of the 

 kind of information they afford. 



I. — Sir Henry De la Beche. 



1. Amount of British Iron. — The Exhibition may be said to 

 have given rise to the most complete view of the iron produce of 

 this country which we possess. Mr Samuel Blackwell, himself an 

 ironmaster, accompanied the collection of iron ores by a statement 

 of great value. He estimates the gross annual production of iron 

 in Great Britain to be now upwards of 2,500,000 tons. Of this 

 quantity, South Wales furnishes 700,000 tons ; South Stafford- 

 shire (including Worcestershire), 600,000 tons : and Scotland 

 600,000 tons. The remainder is divided among the various 

 smaller districts. The iron of England and Wales was produced 

 by 336 furnaces in blast in 1850. Though a considerable quan- 

 tity of British iron is exported, a very large proportion remains to 

 be variously employed in our own industry. 



2. Desilverising of Lead. — As to lead, the illustrations were 

 chiefly British. There was an excellent exhibition of Pattin- 

 son's important process for desilverising that metal — a process 



