2S5 Proposal for the Esiallishment of 



It has been already observed that one man is to work two 

 posts ; the arms must therefore be so poised, by duly pro- 

 portioning the weight of the part (B) above, and of the 

 part (C) below the pivot, that he may with ease be able to 

 raise two arms with each hand, the requisite preponderance 

 of the lower part being at the same time preserved, 



With regard to the signal houses chosen for this kind of 

 telegraph, I have only to remark, that instead of having the 

 two exterior posts over the roof of the building, which 

 jnight require it to be larger than necessary, they may be 

 made to stand upon beams projecting from its extremities*. 



XLVI. Proposal for the Estaldishmcnt of a National Mu- 

 seum. By J. S. Duncan, Esq. of Lincoln's Inn. 



[Concluded from p. 205.] 



J. HE following outlines of tablets, supposed to be affixed 

 to different parts of an arranged museum, are not offered as 

 a complete plan of a museum arranged with a view to the 

 illustration of natural theology, but are sketched slightly, 

 with the view of merely suggesting the practicability of such 

 jnode of exhibition. 



I. Varieties of Power, 

 II. Extent op Power, 

 A. 



1. Attraction. Magnets. Electrometers. Cohering Plates, 

 &c. Compass. 



2. Repulsion. Magnets. Electrometers. Fire-arms, &c. 



3. Impulse. Ivory Balls. Reaction, &c. 



Gravitation appears to be only a particular attraction. 

 Thus, we may say the heavenly bodies are attracted by, or 

 gravitate toward, one another. Some say, all bodies are 

 impelled by external agency in all cases of what is com- 

 monly called attraction and repulsion. Of late this has 

 been maintained by Le Sage of Geneva. It is not material 

 to the conclusions of natural theology, whether thcjse be 



• For several omissions in the former part of Capt. Pasley's communication, 

 ^ee the end of the present Number of the Piiil. Mag. 



different 



