160 J. WV. Stockwell—Hill’s Supplement to Delaunay. 
magnificent distances from productive mines the answer is not 
so much a matter of course. . 
I have a complete record of all the strata encountered, to the 
number of sixty-two, and will cheerfully furnish it upon appli- 
cation. 
Arr. XXV.— Review of Hill’s Supplement to Delaunay; by 
Joun N. STOCKWELL. 
only seventeen exceed one-twentieth of a second of are; and 
only two exceed one second. The vast development, however, 
shows the thoroughness with which the work was intended to 
be done, and if it is not what Mr. Hill claims for it in point of 
accuracy it is owing to some oversight rather than to deliberate 
neglect of any known cause of perturbation. : 
I do not purpose, however, to speak of the results of this 
solution which are common to all the solutions of this problem 
which I have seen, further than to say that it contains the same 
manifest absurdity in the principal equation of the latitude: 
namely, that it makes the coefficient of this inequality directly 
proportional to the cube of the sun’s distance from the earth; 
