844 General Notes. 
It is essential that the mixture be kept at the propér tempera- 
ture until a// the chloroform hes evaporated. A simple test is to 
place a hot wire in the paraffine, if no bubbles arise, it is safe to 
conclude that the chloroform has entirely escaped, . 
After evaporation of the chloroform, the object may be placed 
i he paraffine 
in any desired position, and the afine 
allowed to cool. After cooling the object 
: g can be cut out and fixed to a larger block of 
Pe ee paraffine fitted for the holder of the micro- 
c z « tome. ; 
Boxes for imbedding may be made of red: 
angular pieces of paper of the thickness of 
postal cards in the following manner: fn 
paper is first broken in the lines a a’ and 07, 
the same side). Then in every corner a break 
E erelh 
— 
box are next bent up and the corners at t 
same time turned outward and back behind 
of the knife. The middle 
is so fixed that it will be paralel 
with the edge of the 
Nini 
then cc’ and dd’ (by bending always towards 
Ce A BBC OF D DVM made by bringing 
A cand A a together. The four sides of the 
a spring clip grasping panies 
z the ends A B a é and eet P: tera the 
upper edge of these ends is bent down over the corners. es 
Bubbles around the object may be removed by means of a 
heated wire. 
knife and at 
: ccmpemnaaanianeinmiens , ; i x this f- 
a distance of about a hundredth of an inch from it. desist A its 
pose the writer has found an ordinary hairpin, dept! 
lacquer, about the right size. and the blade 
edge micro 
applicable to the knife when used in any form it Sterling 
for the ends nie 
at og Kingsley, Science Record, 11, No. 5, p. 112, March 15, 1884 
ee perenne Be ras ole eet ae eee 
