596 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
a glass tube, the end of which is perforated in several places. The 
stem of the upper funnel is connected with the water supply. The 
overflow is caught in a still larger 
Fig. 109. funnel, and passes away" to a sink 
through the stem. 
Apparatus for Fixing and Hard- 
ening Small Objects.* — Mr. W. C. 
Stevens recommends the following 
method for carrying material through 
the processes of fixing and harden- 
ing. For very small objects such 
as root-tips, sporanges, and young 
flower-buds, it is specially useful. 
Small glass buckets are made by 
cutting up glass tubing 1 cm. in dia- 
meter into lengths of 3 cm. By 
means of heat one end of each piece 
Fig. 110. 
is turned out so as to form a rim or flange. Over this end a piece of 
muslin is tied. The little bucket is then provided with a suspender 
by means of a piece of thread fixed to the middle of the bottom (see 
fig. 110). If, wdien the bucket containing the specimen is suspended in 
the fixative fluid, the bucket does not sink, a weight should be attached, 
or the air may be removed from the specimen by means of the air- 
pump. 
Thermo-regulated Water-baths for the Bacteriological Labora- 
tory, f — Mr. Y. A. Moore describes two water-baths which have been 
found to work very satisfactorily. 
The larger bath (fig. Ill), to which a thermostat is connected, is a 
rectangular copper tank 40 x 50 x 25 centimetres. It is divided into 
two compartments, each of which has a separate cover and perforated 
false bottom. The partition consists simply of a top cross-piece which 
is about 4 cm. wide. Near its centre is a round opening 2 cm. in 
* Kansas Univ. Quarterly, vii. (1898) pp. 107-10 (3 figs.), 
f Journ. Applied Microscopy, i. (1898) pp. 108-9 (2 figs.). 
