ade ea 
MICROSCOPY. 371 
found a second with numerous animal remains, the age of which 
did not admit of a doubt, and among them a human skeleton. 
The most important among the animal remains were bones of the 
hyzena, horse, marmot, Ursus speleeus, Bos primigenius and various 
species of deer, but none of the reindeer; also numerous rerhains 
of birds, and of land and marine mollusks. The weapons and in- 
struments were made partly of bone, partly of stone, and belong 
in no case to the period of polished stone implements, but to the 
oldest stone age; some of the smaller instruments were made of 
quartzite or felsite. The human skeleton was not in so good a 
state of preservation as the other previously discovered ; it lay 
extended on its back near the entrance to the cavern, the ground 
round it being cov ered with a stratified deposit of ashes, charcoal, 
fragments of bone, teeth of animals, mussel shells and stone im- 
plements. The height of the skeleton must have been, when per- 
fect, as much as two metres or a little over, i. e. about six feet, six 
inches. M. Riviére refers without hesitation both the skeletons 
found near Mentone to the older stone age, about the end of the 
epoch of the cave-bear and Rhinoceros tichorhinus.— A. W. B. 
MICROSCOPY. 
ARRANGING Draromacem.—The convenience of having diatom- 
ace arranged for observation is appreciated by all who make a 
study of this attractive branch of microscopic research. 
The first requisite is a mechanical finger which may be had 
very cheaply after the following pattern:—A plate A (Fig. 79) 
is attached to the body of the microscope by the objective of from 
l inch to 2 inch. To this plate is attached the part B perpen- 
dicular to A; this has the projections b and b' through which 
works the sliding shaft C, the lower part of which is square fitting 
accurately in the projection b. The shaft, the upper part of which 
is furnished with a screw-thread, is raised by turning the milled 
head H, the spiral spring F moving it downward. The arms D 
are attached to the shaft and to these the needle holder d in which 
the needle is placed at an angle of about 45°. This finger can be 
used with nicety with a little practice, and can be made by any 
One that has a little mechanical ability. I have made one that did 
hot cost over 25 cents for the materials. 
The other requirement is a stage plate to carry the thin glass 
Cover. It should be about 14X44 inches, upon which is made to 
