18€6.] Microscopy. | 013 
= tight angles, the horizontal arm being from the lip of the tank 
f about 12™ long; the perpendicular arm is of about the same 
a length. The nose for pouring out the paraffine is so fashioned, 
| = by reentrant folds of the lip on either side of it, that it does not 
necessitate a “ well” larger than the tank; the latter therefore fits 
snugly in the well. 
But in imbedding ordinarily small objects, it is quite unneces- 
sary to remove the tank. It is much more convenient to dif the 
ah out of soft copper wire of from one to two millimeters 
fameter. If the wire is thicker it can be flattened where it 
emerges from the tank under the glass cover. The wire, cut to 
| i proper length, should have one end evenly rounded with the 
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upon a piece of soft pine or cork. The ladle once formed, the 
F wire serves as a handle, and may be bent in any desired manner. 
na It is very desirable that the object to be imbedded, especially if 
Small, Should not be allowed to rest on the bottom of the tank, 
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Sediment? and since it also is difficult to raise delicate objects 
tisfactory way of removing sediment is to allcw the bath to cool very 
e congealing point of the paraffine, in order to allow the impurities to 
of a spirit lamp. The paraffine in immediate contact with the tank 
f elean paper, which is less liable to leave lint behind a cloth’ 
__ These ladles, which are almost indispensable, are readily fash- 
and when quite cold to remove the tank and heat it quickly all 
be removed by thoroughly ribbing the inside of the tank witha ` 
int behind than would | 
ght, rapid taps with a smooth-faced hammer until it is broad and _ 
the blunt, rounded, polished end of some hard object while it rests. _ 
Since with the greatest care there will always be more or less - 
