386 Scientific Intelligence. 
Point is the same that outcrops elsewhere on the Point, and is 
evidently the eastern part of the formation largely expose 
the west side of the river from the base of Stony Point to and 
beyond Tompkins Cove; and it is hence safe to conclude that 
the limestone by the side of the Stony Point dike is a portion 
of the Tompkins Cove formation. 
The sateen. plane of the limestone and soda- scsi ag m4 the 
direction N. E., and dips 67° to the northward; 
for the srs limestone it would be regarded as ‘she north 
wall of the dike. North of the dike, along the section, the 
soda-granite is intersected by blackish, narrow veins or vein 
like dikes, a foot or so wide, two of which cross one pasitae 
like the bars of the letter X. There is also a dike of the chrys- 
origin of the ‘ eee i ite.” They show, like the facts 7 
age, as Seabee for the Tompkins te limstone by Profes- 
ok. 
or G. H. Co 
SCIENTIFIC INTELLIGENCE. 
I. Puysics. 
1. National Conference of Electricians.—On the 17th of July, 
the President of the United States, in pursuance of an act 0 
Congress, appointed an Electrical Commission charged with the 
uty of conducting, in the name of the United States Government, 
“a National Conference of Electricians in Philadelphia in the 
autumn of eighteen hundred and eighty-four.” This Commission 
consisted of the following persons : H. A. Rowland, M. B. Snyder, 
J. Willard Gibbs, John Trowbridge, C. A. Youn ©. F. Brackett, 
W. H. Wahl, Simon Newcomb, G. F. Barker es J. Houston, R. 
A. Fisk and F. C. VanDyck. The Commission met on the 9th of 
August, completed its “ph og cami and sent out invitations to 
about one hundred and fi fifty American and to twenty-four foreign 
men of science, asking them to take part in the Conference above 
mentioned. The Right Hon. Lord Rayleigh, the Right Hon. Sir 
Lyon Playfair and Professor Sir Wm. Thomson were invited to 
act as Vice-Presidents of the Conference 
On the 8th of September, the N ational Conference of Electri- 
cians met at 3 o’clock p.m. The meeting was formally ca called to 
order by Professor Simon Newcomb, who introduced the Presi- 
