( 417 ) 
Aet. %.'K.'KH\.-^Quarte7'ly Abstract the l)mrnat VafiatuM 
of the Magnetic Needle ^ By Colonel Beaufoy, F. R. S. 
Monthly Mean Variation o£ the Magnetic Needle. 
Variation West. 
1820. f Morning, 24° 89' 0" 
Oct. ( Noon, 24 89 88 
^ J Morning, 24 82 28 
j gg 
■p. f Mornitig, 24 88 08 
( Noon, 24 86 84 
Art. the Transactions of the Royal 
Society of Edinburgh^ Vol. IX., Part I. 
Tm part of the Transactions of the Royal Society of Edin- 
burgh, which has just appeared, contains papers, and 
is illustrated with Thirteen plates. Several of these communi- 
cations are of ai very popular and interesting nathre, and may 
be perused with much pleasure, even by those who are not in 
the habit of seeking for amusement or informatiofi in the trans- 
actions of learned Societies. 
1. On the Parallel Roads qf Lochaber, By Sit Thomas 
Dick Lauder, Bart. F. R, S. E. ; p. 1.— 64. With Eight 
Plates. 
In this curious and interesting paper, the author begins by 
giving a general description of the formf and appearance of the 
shelves or Parallel Roads He next suggests the theory which 
may account for the formation of such appearances in general : — 
He then gives a particular account of the whole shelves of Locha- 
ber, as Connected with the topography of the glens where 
they are found, and he concludes by stating the theory which 
appears most likely to explain the circumstances of their parti- 
cular formation. 
The Parallel Roads, as they are called, are a series of shelves 
which extend themselves ‘’horizontally along the sides or faces of ^ 
VOt. IV. NO. 8. APRIL 1821. D d 
