Waverly Formations of Central Ohio.—Prosser. 361 
give it a thickness of 100+ feet. The thickness is in close 
agreement with professor Herrick's statement that "one-half 
mile east of Clay Lick there is a nearly continuous exposure of 
about 100 feet of alternating conglomerate and coarse sand- 
stone of prevailingly red color."* 
THE UNTENABLENESS OF THE NEBULAR 
THEORY. 
By N. MiSTOCKLKS. Minneapolis, Minn. 
in. 
{Continued trom page 319.) 
THE RELATION OF THE EXCENTRICITY IN THE ORBITS OF 
THE PLANTS TO THEIR SIZE AND THEIR DISTANCE 
FROM THE sun; HOW THE MOONS HAVE 
COME TO THE PLANETS. 
The scientific investigator often discovers that matters to 
which he has before paid but little attention on account of 
their apparently small significance, prove to be of decisive 
importance in arriving at a correct understanding of the law 
or natural phenomenon which he is studying. This we our- 
selves shall experience before we close this chapter ; for we 
shall find that the solution of a very comprehensive problem 
concerning the arrival of the moons to the planets depends 
greatly on a correct conception of the excentricity of the plan- 
etary orbits, to which, in general, but little attention has been 
paid. Let us, therefore, preliminarily, proceed to the discus- 
sion of this subject, in order, thereby, to gain a better under- 
standing, than would otherwise be possible, of matters de- 
pending thereon. 
The excentricity of the orbits of the planets stands in re- 
lation to the size of the planets and their distance from tl>e 
Sun. The truth of this statement may not be readily ac- 
• Ball. Sci. Lab. Denison Univ., toI. ii, 1S87, p. 15. 
