00 THE SPECTATOR. 



of the body ; and, as the ' forces of inertia' of the various weights 

 act unitedly, and not in opposition to each other, the ^ force of 

 inertia' must, necessarily, be the same each way; and therefore, 

 when the stability, or the resisting force is the same each way, 

 the motions of the body must be the same in extent each way also . 

 And this is the cause, that tlie vibrations of the beam with un- 

 equal weights, at unequal distances from the axis, are the same in 

 extent one way as the other ^ 



THE SPECTATOR, No. VIII. 



The Spectator has much pleasure, this month, in calling the 

 attention of the readers of the " Museum,-' to an exhibition which 

 is perfectly novel in Plymouth, and most probably is little known 

 in the West of England ; he alludes to the Cosmorama, which 

 is to be seen daily, at the " Civet Cat," in Whimple Street. 

 Those who are unacquainted with the nature of such an exhi- 

 bition may be told that it consists of a series of views of different 

 places, which are remarkable either for picturesque scenery, or 

 are celebrated in consequence of being the site of some important 

 event. By the adaptation of powerful lenses; and artificial light, 

 an extremely pleasing illusion is presented to the observer. In 

 one instance, namely, the view of the interior of St. Andrew's 

 Church, natural as well as artificial light is made use of; and 

 their combined actions produce an effect perfectly similar to that 

 of sun-light illuminating part of the building : the perspective 

 illusion is also much improved by this management : this is what 

 is called a dioramic effect. The views at present being exhibited 

 are — 



No. 1, — An action which took place during the Burmese War; exhibiting 

 all the sanguinary incidents of such a conflict. 



2, — The Thames Tunnel ; a very accurate representation of this stupendous 

 undertaking. 



4, — A view in Brecknockshire ; very picturesque and interesting. 



5, — The March of the French Prisoners into Salamanca, in the year 1812; ;» 

 very spirited and striking scene. 



6, — The Cape of Good Hope ; a very fine and faithful representation. 



7,^Constantinople. This view has been considered, by naval men who 

 have been on the spot, to be an excellent and accurate picture. 



8,— Alexandria; a good contrast to the architecture and dress of our own land. 



We must observe that the proprietors of this pleasing and ra- 

 tional exhibition make no charge for showing it; and tlie princi- 

 pal, Mr. Ilickson, is extremely courteous to all visitors*. 



