Miscellaneous Intelligence. 345 
tiful Ne halls in the world. The afternoon was given up to the 
Museums, Libraries and Laboratories, and the evening to a garden 
i Mr 
: ll. 
e evening of Friday was devoted to a General Session to 
hear the paper by Mr. Bell, on his new apparatus, e Photophone, 
a subject of great general as well as scientific interest. 
On Saturday afternoon the Association enjo ed = sail wr 
Boston harbor, as the guests of the City of on, about on 
the good people of Boston. There were excursions to Salem, with 
visits to the Museum there, and the liberal hospitality of Mr. 
Endicott Peabody ; a Geological excursion to Marble Neck; 
visits to Lowell, and many other places. 
On Monday, after the close of the meeting, came the excursion 
to the White Mountains, for which arrangements had been made 
by the Appalachian Club. Thanks to the liberality of = Eastern 
Railroad, free tickets were supplied for three hundre mbers. 
The Association adjourned on Wednesday to ini at Cincin- 
nati, under the Presidency of Professor — J. Brusn, of the 
Sheffield Scientific School of Yale Colle 
The following is a list of the Papers Seoupedd: : 
1. Mathematics, Physics, Astronomy and Meteorology. 
TOHETT : Determination of the rotation-time of Jupiter, from ing 
the ro ie spot in 1879-80, together with the physical characte: 
chemees of the spot 
. A. Norton: The force of effective voonitioner! action, ae the mechanical 
laws and properties depauligas upon it; Determination of the comparative dimen- 
sions of ultimate molecules, and deduction of the specific saneain of sub- 
Bod: JS EFFRIES : vermis pot 
W. FERRELL: Maxima and minim hes ee ng machine. 
C. J. H. Woopzury : “ riction of lubriea ting oils. 
Huu: Prob in Watson a = 
T. Craig: Steady and vortex incompressible fluids. 
W. H. Ba Improvement of the Mississippi Rive 
pectroscopic s, being a notice of certain spectroscopic 
observations, principally solar, made in 1879- 
GE: Heat produced t and steel 
ARREN: Some observations « on on geometric teeing as psn on angular 
rather than linear ratios 
i A. Antuony: Lecture experiment for the direct determination of the velo- 
city of sound. 
W. A. Rogers: Progress made at the Observatory of Harvard College in the 
determination of the absolute codrdinates of 109 fundamental stars; A simple 
8 
Bacon, Cunard steamer ‘ Scythia;” The errors of a few English, French and 
American sue micrometers. 
