270 MICRO-CHEMICAL REAGENTS. 
solved by the pressure of the glass cover upon the slide into the 
separate elements (Fig. 186), which may then be conveniently 
further examined. It is, however, to be considered that the 
reagent produces a swelling of the membranes, as also a solution 
of the bodies contained therein. It is likewise to be observed 
that Schultze’s maceration dissolves the lignin from the lignified 
membranes, so that the latter then show the cellulose reaction. 
Before the objects that have been thus treated are brought 
Fig. 186.—Isolated elements of cinnamon bark obtained by maceration with Schultze’s 
liquid. b, bast-cells; sc, stone-cells (sclereids); p, parenchyma; sch, mucilage cells; 
st, starch granules of the cinnamon (Tschirch). 
under the microscope, it is necessary to thoroughly wash out 
the reagent. 
5. Acetic Acid of the specific gravity 1.040 often clears up in 
a remarkable manner such sections as have previously been 
treated with alkalies. Since calcium oxalate is insoluble in 
acetic acid, the latter may also be employed as a confirmative 
_ test when the recognition of this salt is in question (compare — 
page 133). This acid is likewise of service in the examination 
