92 AstronGjnical Tables and Observations. [Jan. 



ed: these views are sketches of the left hand end of the 

 beam, or the end opposite to the pointer end. In both 

 figures c, and d, are pieces of brass, the piece d, being firm- 

 ly and securely fixed in the end of the beam, and the piece 

 c, sliding in a groove and having liberty to move a small space 

 to and fi'o as shewn in fig. 10. Small screws e, e, pass through 

 the brass d, and thrust the brass c, which carries the points, 

 towards the fulcrum ; the wire b^ fig, 9, has a shoulder 

 abutting against the end of the beam, and passing into the 

 beam is screvv ed and tapped into the brass c, so that when 

 the screws e, e, are loosened this screw acts in the opposite 

 direction or pulls back the points away from the fulcrum, the 

 brass c, having liberty as before stated to move to and fro in 

 the groove ; it is evident therefore that this contrivance is 

 competent to the adjustment of the balance, although the brass 

 carrying the points at the other or pointer end is permanent- 

 ly fastened in the beam. I have only to add that f, in figs. 

 9, and 10, is a tightening screw, to fix more securely the 

 brass c, after the adjustment has been effected. The adjust- 

 ment was made as before, only with 1000 instead of 100 grains 

 lin each scale. 



15. The scale pans are supported in the manner exhibit- 

 ed by figure 1 1 ; the points enter small polished concavities 

 in the screws a, a, as described in figure 7, Para 11. (which 

 see.) — I have adopted double points because the weights foj. 

 w^liich this balance is used are heavier, and because they are 

 more convenient in practice, there being no wandering, or 

 twisting of the scale pans. My fourth balance is precisely 

 similar to the 3rd only stronger and calculated to weigh from 

 1000, to 10,000 grains. J. B. 



V. — * Astronomical Tables and Observations. By Godaij 



Vencat- Jiigga ro w , 

 To the Editor of the Madras Journal 



of Literature and Science. 



Sir, 



I have often heard it remarked, that this is an age of im- 

 provement in every department of knowledge ; whatever may 



* have much pleasure in giving insertion to the following let- 

 ter and its accompanying tables, tiie calculation of which would have 

 reiiected credit, on the talents and industry of a member of an Eu- 



