356 Qn the Mounting of Fossils. ‘[April, 
with shellac, not varnish, and selecting a wire of suitable size, 
make two hooks, like Fig. 1, to fit the jaw near its 
ends, set them up in the block, slip the jaw into 
them and it speaks for itself, and is safe. Of course 
the block must always be just so large that no part 
Fiz 1 of the bone will overhang the edge, and then the 
specimen will not be injured by crowding it against 
_ the wall or another specimen. If larger than needed 
it wastes shelf-rcom. If the specimen be large and 
i ) heavy, or at all crumbly, the supports need to be 
tig 2 wrapped with cloth or felt to protect it. 
y Suppose wè have both rami, or the greater part 
of them. Mend the breaks with the cement, and when dry bend 
two stout wires as in Fig. 2, one to bind the jaws together at each 
end, cement them in place and let them dry. Then set up three 
wire hooks to receive these braces, as at J and c, Fig. 3, one in 
front and two behind, as far apart as the jaw will allow. The use 
of these hooks is so obvious that the most careless or dull stu- 
dent can hardly fail to see it, which is a good thing, because if a 
Skull and atlas, eight and a half inches long. 
blunder be possible some persons can always be depended on to 
make it, and hence come many breakages. If beside the jaw we 
‘have the skull, we need two more wires, one to catch the back of 
the skull at the glenoids (Fig. 3 d), and the other to support the 
oe nose (a). 
In this specimen the sixth wire (e) carries the atlas, as shown 
in Fig. 4. When it came from Dakota it was a solid block of 
_ stone with corners of the bone sticking out, and it was work 
apart entirely with needle and mallet. 
