27 



26° 29' west ; and as the yearly value of the secular change 

 of the declination is - 6'- 06, the mean declination, in any not 

 very remote future year, will be given by the formula 



g o = 26°29'-6'-06xra; 



n being the number of years, counted from the present. If 

 greater accuracy be desired, the diurnal and annual variations 

 of the declination, corresponding to the time of the day and of 

 the year, must be added." 



The Secretary, on the part of Mr. M. J. Anketell, presented 

 to the Museum of the Academy a man's shoe made of three 

 pieces of thin plate bronze or brass. This shoe, Mr. Anketell 

 states, was found, with about two dozen pair of the same kind, 

 near an old heap of stones in the vicinity of the Giant's Cause- 

 way. 



" This shoe (A), with another (B) of the same kind, ex- 

 hibited, was purchased in the year 1831, by Mr. Anketell, 

 from a brazier inColeraine, who had melted down or worked up 

 all the others found, he not considering them to be of any pecu- 

 liar value. 



" Along with the shoes were found the two small vessels 

 exhibited. They are made apparently of the same materials, 

 but they are differently fabricated, and put together with great 

 care, and are evidently intended for use ; while the shoes, on 

 the contrary, are only fastened together so very imperfectly 

 with lead, used as solder, that the least wear, or motion of the 

 foot of a person attempting to walk in them, would break the 

 soles away from the uppers. 



" One of the vessels is a cylindrical cup, having the fol- 

 lowing dimensions, its bottom being slightly convex : 



Diameter, \\ inches. 



Depth, 3£ „ 



" This cup is brazed, and the edges of the brass plate, at the 



