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H, Goadhy on the Preservation of Aniinal Sithstaiices. • 385 



The dissolved glue should be rapidly appHed to the rim of the 

 glass jar (which mast be quite dry and Uee from grease,) with a 

 brush, and the only brush that will stand, I make in this way. 

 I take a piece of rattan cane as long as a cedar drawing pencil, 

 and cut off the cortex carefully from one end of it to the length 

 I desire the brush to be, being particular not to let the knife go 

 into the substance of the cane any more than I can help- I 

 macerate the prepared end of the cane for a short time in water, 

 and then^ while yet wet, I pound it with a hammer upon some 

 hard substance (iron or stone) constantly turning it with my hand 

 until all the fibres o^ the cane be liberated, and my brush is then 

 complete. I still use a brush of this kind which I have employed 

 for several years extensiv^ely, and none other will stand twice 

 using, the hairs come out with the glue, and are in the way of a 

 good joint. A disc of glass should be cut to fit the top of the 

 jar, made clean, and the part that is to be in contact with the jar 

 also thinly coated with the hot glue. The disc should previously 

 have had a small hole drilled through the centre, (about one- 

 eighth of an inch diameter) for a reason that will presently appear. 

 The two surfaces of glass being apparently coated with ma- 

 nne glue, but really without contact^ the latter must be insured 

 by means of a hot iron which should be carefully passed over 

 the surface of the glue several times till it and the glass become 

 hot, care being taken to keep the iron constantly in motion, and 

 always on the edge of the jar, or of the disc, as in that case the 

 e:^pansion will be equal, and no danger occur even if the iron be 

 red hoi; but, it will instantly break if the iron be allowed to 

 linger in one place, or touch any but the outer portion of the 

 disc, or the rim of the jar. 



The jar should be thus prepared while empty^ and dry ; and 

 ^vhen complete, the fluid may be poured in, to about one-half the 

 height of the jar, together Avith the preparation to be suspended 

 ^u it. The strings necessary for this purpose may be brought 

 over the edge of the jar, and pressed into the ghie on the surface, 

 if soft enough to admit of it ; the preparation may now be regu- 

 lated to the required height in the jar^ and the threads of suspen- 

 sion kept in their place by a wet string passed round them on the 

 outside of the jar, sei^eraf times. If any fluid chance to be on the 

 surface of the marine glue on the rim of the jar, it should be re- 

 moved ; and when dry, the prepared surface of the disc should be 

 placed on the jar and the two brought together in intimate contact 

 hy the hot iron, which, as jn the former case, must be constantly 

 passed round on the edge, and the disc simultaneously pressed 

 <3ovvn, until the process be completed. The extraneous glue on 

 Ae outer edge may be made smooth and neat, by the hot iron. 

 By means of a syringe, to which a small pipe is affixed, fill up 

 the jar with the preserving fluid, not quite full, however, as the 



