54 TRANSACTIONS OF THE [Nov. 4, 
lization of the latter. Otherwise the garnet is the last formed 
constituent of the rock. 
The Dikes.—The specimens of dike rocks obtained by Dr. 
Reid, in 1892, are, for the most part, diabases and present no 
characters additional to those already described from the region 
by Dr. Williams. There is a specimen of a diorite dike (No. 
129), which shows most beautifully the effects of dynamic action, 
and is evidently far older than the diabase dikes. 
WESTERN RESERVE UNIVERSITY, October 24, 1895. 
REGULAR Business MEETING. 
November 4th, 1895. 
The Academy met with President RExs in the Chair; sixteen 
persons present. 
Minutes of the preceding meeting were read and approved. 
The nominations for membership of R. E. Dodge and James 
Marsland Lawton, Jr., were reported approved by the Council, 
and they were elected by the Academy resident members. 
The Section in Astronomy and Physics then organized, and 
listened to a paper by Prof. R. 8. Woodward, upon “ Systems 
of Mechanical Units,’ Prof. Woodward referred to the im- 
portance of the dimensional formule in discussing systems of 
units, and called attention to their introduction in 1821 by 
Fourier, and their subsequent revival by Maxwell. He pointed 
out some of the difficulties arising from the adoption of the 
present fundamental units of length, mass and time, and showed 
how, by the elimination of either length or time and the sub- 
stitution of energy, new systems could be obtained. He dwelt 
upon the desirability of the system in which energy replaces 
time for those people who may have no conception of time, and 
pointed out that the conceptions of energy are certainly as dis- 
tinct as those of mass, and, possibly, even as distinct as those of 
length and time. 
This paper was discussed by Messrs. Pupin, Hallock and 
Pfister. 
