Traces of Primitive Man. 47 



flint implements found in sand dunes and caverns, illustrations 

 of cromlechs, sepulchral monuments and urns, lake dwellings, 

 and human remains, and in each case continental examples were 

 compared with what occurs in the North of Ireland. The slides 

 were admirably exhibited on the screen by Mr. J. J. Andrew. 



Mr. Young — With regard to the sepulchral monuments that 

 have been referred to, I think there is no doubt of what Dr. 

 Petrie has written, that though these monuments are now bare 

 and what are called cromlechs, originally they were meant to 

 be covered with either clay or gravel and loose stones. 



Mr. Allworthy — I would like to ask Mr. Gray a question — 

 We have found the bones of animals, but has it been clearly 

 shown that we have the remains of man himself mixed with 

 the other remains which are primitive ? 



Mr. Greenhill — I did not quite understand one point 

 referred to by Mr. Gray — the connection between astronomy 

 and primitive man. I am aware that the glacial age was one 

 of the subjects taken up by Sir Robert Ball, but I do not see 

 what astronomy has to do with the subject dealt with by 

 Mr. Gray. 



Mr. S. F. MiLLiGAN, M.R.I.A., exhibited a very valuable 

 collection of rare Irish and Mexican antiquities, recently found, 

 and gave a brief and instructive explanation in reference to 

 many of them. 



Mr. Isaac J. Murphy read a Paper entitled 



"THE DIVISION OF ANGLES AND ARCS OF 



CIRCLES." 



I have entitled the paper, " On the division of angles and arcs 

 of circles into aliquot parts," in which title there may seem to 

 be tautology, for the division of an angle includes with it the 

 division of the arc of the circle, actual or supposed, which 

 subtends the angle, and vice versa. But practically in some 



