140 Scientific Intelligence. 
Within the last two or three years, M. Lion, Professor of Physics at 
Beaune, in France, has maintained that the intensity of the magnetic 
force of the earth is increased during a solar eclipse. To test this, 
observations were made during the late eclipse with the following ap- 
paratus: A magnetic bar, 44 inches long and 4 of an inch square, 
weighing 400 grains, was placed ina stirrup of thin sheet brass—the 
two together weighing 410 grains—and, by a hook of fine wire, was 
suspended by 5 fibres of untwisted silk, 10 inches in length; the whole 
at intervals during the day ; the end of one oscillation, and the begin- 
ning of the next, being taken at the instant that the axis of the magnet 
coincided with that of the telescope, the north end of the magnet 
swinging from west to east. ‘The results are contained in the following 
table. The approximate interval for 100 oscillations was 17 minutes. 
The first column of the table gives the time of the phases of the 
eclipse and of the middle of each interval occupied by 100 oscillations 
the second column, the precise length of interval of each 100 oscillations 
Date. Interval of 100 oscillations. 
min, sec. 
h. m. 
26th—10 08, a. m. - - 15°93 
12 25, P. M. : General eclipse begins. 
i251, “ . : 17 16°20 
08, ‘ - : 17 15:58 
125, “ . - 17 14°80 
316, “ . - 17 15: 
335, ‘ - General eclipse middle. 
359, “ . Eclipse begins at Charleston. 
431, “ . : 17 15°98 
448, “ - . 17 16-10 
509, “ - Eclipse middle at Charleston 
601, “ - - 17 15°56 
6 18, ¥ * 5:94 
6 19, * Eclipse ends at Charleston. 
20 2 
General eclipse ends. 
. 17 15°12 
‘ 17 15°15 
