oko: 4 se. a area 
Miscellaneous Intelligence. 297 
perihelion an} then in its aphelion. The earth is now pressed, now 
elated, its envelop now expanded, now condensed, between" those two ro- 
lating balls, or magnets, or voltaic piles, or weights, or whatsoever they 
are called with reference to phenomena classed under those various de- 
Nominations, 
V. MISCELLANEOUS SCIENTIFIC INTELLIGENCE. 
1. Telestereoscope—Professor Tetmuotrz has described an instrument 
over the landscape itself, The instrnment is made up of four mirrors 
and two eye-glasses, Two mirrors placed, alike, at an angle of 45°, one 
to the right and the other to the left, receive the rays of light from the 
andseape, These mirrors throw the rays horizontally towards one an- 
other to two oblique mirrors, which throw the rays through the eye- 
‘ses to the eyes. In a window, place on either side, say three or four 
feet or the width of the window apart, a mirror, at the angle stated, to 
course to a point in the room. The mirrors will have the position 
the halfopened shutters of the window, The rays from j 
reaching them will be thrown parallel to the window, those of one 
Mirror towards the other. Now b placing at the middle of the window 
to smaller mirrors meeting like the legs of a V, but at an angle of 90°, 
and facing in the room, the rays will be thrown into the room; and if 
these two mirrors are not too large or are properly placed, the rays will 
me just the distance apart required to pass into the eyes. A box or 
Me May enclose the mirrors, and a couple of Jenses be inserted as eye- 
Pieces, and the effect thereby be improved ; thongh the lenses should have 
we Pethi ‘ i The mirrors should ma 
y 
Window 3 altl 
> although not to any very great advantage. 
g. eae & reflectors must be turned 
0 
Tound their Vertical axes so that the angle between their surfaces and the 
exa dimensions in the di- 
rface are to 
mirrors must always remain parallel 
. the small ones, The aspects of near objects, ney. of the human 
on, om the reduction produ « 
one that it is ie eri | pictures that the observer imagines he sees, 
reduced bodies. 
SECOND SERIES, VOL. XXV, NO. 14-—MARCH, 1864, 
33 
™ 
