of Edinburgh, Session 1881-82. 
405 
estimate of the equivalent, over the whole earth’s surface, to the 
true tidal deformation of the water of the oceans. If the obliquity 
HCS were the same in the two cases, and if the sun were the 
external attracting body in each case, the value of L would be 
(50/*08.13*596 = )45*9 times greater in the second case (fig. 1) 
than in the first case (fig. 2). Suppose now the moon, instead of 
the sun, to be the influencing body in the second case (fig. 1), 
other things being the same, the couple will be 91*8 times as great 
in the second case (fig. 1) as in the first case (fig. 2). (Because 
the moon’s mass, divided by the cube of her distance from the 
earth, in about double the sun’s mass divided by the cube of his 
distance from the earth.) Now, we must make the couple to be 
only 10 times as great in the second case (fig. 1) as in the first case 
(fig. 2) to bring out Adams’ result, according to Delaunay’s explana- 
tion of it. Hence we must suppose, in fig, 1, sin HCM cos HCM to 
be 1/10 of sin 30° cos 30° j and we may fulfil this condition by 
taking HCM = 87° 30'. 
Thus with the approximate results of observation used above in 
respect to the earth’s atmosphere, and the assumptions we have 
now made regarding the lunar tide, we have a state of things in 
which our supposed chronometer B gains on A 2*5 seconds in the 
course of the century through the thermodynamic acceleration, and 
loses 25 seconds through the tidal retardation ; that is, loses in all 
22*5 seconds, or say 22 seconds, which is Adams’ result. 
3. Notes on a Cist discovered at Parkhill, Dyce, Aberdeenshire, 
in October 1881. By William Ferguson of ICinmundy. 
With Notes on the Bones by Dr. Fife Jamieson, M.B. 
The station of Parkhill, on the Great North of Scotland Railway, 
is seven and a half miles from Aberdeen, and the cist which is 
the subject of these notes was situated in a mound of gravel and 
sand to the north-east of, and within one or two hundred yards of, 
the station. This is the second which has been uncovered at the 
same spot, — a previous one having been disclosed in 1867, the 
contents of which — a vase and some bones — are preserved in the 
Anatomical Museum, Marischal College, University of Aberdeen. 
