154 Miscellaneous Intelligence. 
the propriety of Mr. Dana’s natural suggestion, and —_— us ee high 
on the best of _. that if Prof. Agassiz had known what was in the 
book in question e would not have written at all. Rs to a day of 
Prof. Agassiz’s a re for Europe there has been no interruption of 
the cordial intercourse that has always subsisted between him and Mr. 
na; and we are confident that if he had not left the country imme- 
diately after the arrival of the pamphlet, he would himself have made 
a statement similar to this, i in his own name.— 
2. Auroral Arch—During the oe? of the aurora borealis seen here 
on the evening of Friday, April 29, 1859, a well defined luminous arch 
or belt sprung up, spanning the sky from the western horizon wea A over 
to the eastern, and passing a little south of our zenith. This was its ap- 
pearance at gh 53™, when it was fully formed. Ten or fifteen 7 aeiniutas 
previous it was not visible, and T did not observe the process of forma- 
tion. Its width fro 
southward while the part for twenty degrees or more about the meridian 
changed its place so little and so slowly, as to present an uncommonly 
good caine for fixing its place among the stars, and to render exact 
in time less important. At 8h 58” 0s, New Haven mean time, 
middle line of the arch. The phenomenon gradually faded from the east 
westwardly, and by 92 38™ all had vanished. During this whole time 
the sky was clear and there was no secondary arch to embarrass the ob- 
serv 
It i is 3 greatly to be desired that these and other data secured here may 
be with like observations made to the north and south of New 
Haven, in order to determine the altitude and width of the arch. Through 
the kindness of Professor Loomis a few have reached me, but they are 
too indefinite to be useful in this respect. Loose observations at Suffield, 
Conn., combined with those made here seem to indicate a height of much 
more than 100 miles. Any one within 300 miles of this place who may 
have any pels observations on the _ is earnestly desired to pub- 
n this Journal, or to send them e. C, Herrick. 
pi sbi. Conn, 
On Apparent Equivocal Generation; by H. Jamuzs Cini of 
ania , Mass. (From the Proceedings of the American Academy, 
ay 10th, 1859).—At the close of our last social meeting I 
I 
Boston, 
Was as seen any trace of organization in the globules of the — 
Vibrio-like fibrillze of the muscle of Sagitta. (See p. 108 of this number). 
puerta our common jelly sh I observed that the whole Arafat 
mass of cells was in violent os each cell dancing zigzag about 
* 
