. 
image of the object on a screen where it cou 
$14 MICROSCOPY. 
custrines formed their cutting instruments). This hatchet is six- 
teen centimetres long by seven broad, and is by far the largest yet 
discovered in any part of Switzerland, no other collection having 
any measuring more than eight centimetres in length. A quantity — 
of the bones found at the same time have been sent to Dr. Uhl- 
mann, of Münchenbuchsee, for examination by him, and he faif : 
that they belong to the following animals, viz :— stag, horse, 0%, F 
wild boar, pig, goat, beaver, dog, mouse, etc., together with a 
number of human bones. If the level of the lake continues to — 
sink, it is hoped that further discoveries will be made, and the | 
scientific world here is waiting the result of the engineetinaa e 
tions with keen interest.” — The Standard. — Nature. 
MICROSCOPY. 
Tue Microscope mm tHe Lecture Room.— Dr. 
of Heidelberg sends a notice to the ‘ Botanische Zeitung” 0 
talatopedpe in RETRA scientific lectures. 
the plan of bringing in a number of instruments 
which a preparation has been placed, are many and “serious. | 
most important is perhaps the difficulty which one un 
to the use of the microscope has in understanding the new © 
strange appearances presented, and that while looking at u 
inent objects in sight, such as air bubbles and forig" j 
marked and strong outline, he misses altogether the ag 
which ought to have been seen. The experiment of 
ordinary microscope as a solar microscope and p! a 
Id be seen 
whole class at once, and their attention directed to = 
points, was tried last summer, and with the most eo 
e used one of Hartnack’s first class instruments ¢ 
horizontal position and received the image on à mee 
from five to eight metres making an image of two deig 
in diameter. An heliostat and one or two cond 
directed the light on the object. The microscope” 
that the stage was somewhat this side of the 
- When images were desired as free as possi 
aberration the ocular was removed and the imag? 
