1852. ] OF THE ROYAL INSTITUTION. 119 
prejudice, is the characteristic of American Naval Architecture and 
Nautical Practice. Disbelief in the power of prejudice and the 
virtue of routine is the principle which this example inculcates ; 
and if it lead us to-believe in science and our own judgment, 
and to emancipate ourselves from the trammels of prejudice grown 
old under unwise laws, and to cease from building ships by Acts of 
Parliament and Club laws, the recent victory of the America and the 
present victory of American Packet-ships will prove to have been 
benefits in disguise. [J.S. R.J 
In the Library, were exhibited :— 
Model of the Yacht ‘* America.” [Exhibited by Mr. Scott Russell. ] 
Model of Apparatus for enabling a Ship’s Company to take to the 
Boats simultaneously, and for the rapid disembarkation of Troops, 
by Julius Jeffreys, Esq. F.R.S., M.R.I., and Model of a Safety 
Boat Sling for a similar purpose, by Mr. Landells. 
Model of a Brig with Revolving Masts, &c.—and Sculptured 
Windows from Akbar’s Palace. [From United Service Institution. ] 
Models of Bones of Iguanodon, &c. and Impression of Labyrintho- 
don. [Exhibited by Mr. Tennant.] - 
Printing in Colours: L’ Allegro, I] Penseroso, and View of Notting- 
ham. —Portrait of a Child; and Walter and Jane, in Water Colours. 
— Portrait of Joseph Hume, Esq. M.P., in Crayons, — by Mr. C. 
B. Leighton. 
Talbotype Portraits by Messrs. Henneman and Co. 
Specimen of Pearl Enamelled Glass, and Jewelled Papier Mache. 
[Exhibited by Messrs. Allen.] 
A Crozier, carved in wood, by Mr. W. Rogers. 
Microscope by Mr. Varley. 
WEEKLY EVENING MEETING, 
Friday, February 13. 
Tue Duke or NorraumBertanp, F.R.S., President, 
in the Chair. 
W. R. Grove, Esa., M.A., F.R.S., 
On the Heating Effects of Electricity and Magnetism. 
In the early periods of philosophy when any unusual phenomenon 
attracted the attention of thinking men it was frequently referred to 
a preternatural or spiritual cause ; thus with regard to the subject 
about to be discussed, when the attraction of light substances by 
rubbed amber was first observed, Thales referred it to a soul or 
spiritual power possessed by the amber. 
