1884.] Microscopy and Histology. its 
first-named fluid, then transferred to the second and left for the 
ti 
same time, 
While these methods were good for the Decapods, ‘Amphipods 
and Phronomide, the Isopods required a different treatment. 
With these Kleinenberg’s picro-sulphuric acid, diluted with an 
equal volume of water, and allowed to act 15-20 minutes, gave 
much better preparations than the sublimate solution. 
A new Section FLATTENER.—The following device as an anti- 
roller has been recommended by Gage and Smith?! 
“The section flattener consists of a rod (4) of spring brass, 
about 5™" in diameter, flattened on two sides (B and D), extend- 
ing parallel with the edge of the knife, and projecting about 2™™ 
ond it. Opposite the cutting edge the space between the rod 
and knife is about 1™™ while nearer the back of the knife the dis- 
tance is greater (Fig. 1 D, a,b). At each end the rod is bent at 
right angles. Next the handle it passes through a hollow cylin- 
der (Fig. 1, d), into which it is secured by a milled nut (Fig. 1, c). 
At the tree end of the knife, the rod is hooked over the back of 
the blade (Fig. 1, A), the spring of the wire securing it firmly. 
a me two angles of the rod it rests on the blade, so that in cut- 
ting sections any amount of pressure may be applied at these 
Ponts. The rod js attached to the knife by means of a clamp, 
Which consists of two pieces clasping the tang and held together 
by a screw (Fig. 1, C). To clean the knife and rod, or to remove 
Aa ons, the rod may be raised as it swings freely in the hollow 
aa attached to (d). The rod may be removed by removing 
n 
- 
A Maag ™ section fattener attached to a knife. (2), blade of knife; (at), tang; 
Olinder; 7.) Ener; (c), milled nut; (d), the part of the clamp bearing the hollow 
ether, ” (e), part of clamp; (f), screw holding the two parts of the clamp to- 
` te eg "Owing the end of the flattener hooked over the blade ; B and D, sec- 
the knife. C the form of the rod (4), and its position with relation to the edge of 
a ction of the tang, showing the manner of attaching the clamp. 
i _~ Section-smoother introduced by Andres, Giesbrecht, and 
Settion Flattener for Dry Section Cutting.” The Microscope, February, 1884. 
