The lenses of the eye-piece are fixed therein by means of a copper ring.
The object glasses are placed in the ends of the tubes, AB and CD, at
_oo_.
When the instrument is closed, it forms a cylinder 35 millimeters in
diameter by 11 centimeters in length. To open it, it is grasped by the
extremities and drawn apart horizontally so as to bring it into the
position shown in Fig. 2. Then it is turned over so that the screw, V,
points upward, while at the same time the two tubes are pressed gently
downward. This causes the eye-pieces to revolve around their axes, _vv_,
and brings the two tubes parallel with each other.--_La Nature._
* * * * *
ANCIENT GREEK PAINTING.
A lecture on ancient Greek painting was lately delivered by Professor
C.T. Newton, C.B., at University College, London. The lecturer began by
reminding his audience of the course of lectures on Greek sculpture,
from the earliest times to the Roman period, which he completed this
year. The main epochs in the history of ancient sculpture had an
intimate connection with the general history of the Greeks, with their
intellectual, political, and social development. We could not profitably
study the history of ancient sculpture except as part of the collateral
study of ancient life as a whole, nor could we get a clear idea of the
history of ancient sculpture without tracing out, so far as our
imperfect knowledge permits, the characteristics and successive stages
of ancient painting.
Pages:
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98