Mr. Groombridge on the four Minor Planets. 459 



to require 2000 tons a year for its varied manufacture. About 

 3000 tons have of late been annually sent to the East Indies 

 and America (United States); the West Indies and different 

 countries m Europe take from us considerable supplies. 



Of the large portion of lead which our mines produce, a 

 considerable part is worked up mto forms which at once de- 

 stroy it, so that it does not return again for use. Thus SOOO 

 tons a year are made into small shot, partly for home con- 

 sumption aird partly for exportation. The quantity made into 

 white and red lead and principally used as pigments, and part 

 converted into the glazing of pottery, or an ingredient of 

 glass-making, is little, if at all, short of 10,000 tons. 



Tin IS an article of export to most countries: a great deal is 

 often sent to China, and in the manufacture of tinned plate, 

 or thin rolled iron coated with tin in the manner described 

 above, is a large article of commerce. 



Mr. Taylor concluded by stating, that the subject might be 

 pursued in another direction, by considering some of the most 

 important metals separately, and by showing more in detail 

 the application of principles which he had generally noticed, 

 which at some future period he might perhaps attempt. 



XCII. Apparent Places of the four Minor Planets at and about 

 the Tivie of their ensuing Opposition. 



Rad. ® 



npHE distance of Pallas and Juno at their opposition will 

 -*• render their light so very faint, that it is doubtful whether 

 they can be seen; especially the former, from the rapid 

 change in declination, which will remove it from the field 

 of view of the preceding night. The succeeding oppositions 

 will not happen till 1825. 



Blackhcath, June 14, 1823. S. GROOMBRinnE. 



3 M 2 PAL- 



