, 'Scientific Intelligence. — . Art ®. 
195 
ARTS. 
48. Manufacture of Paper from Marine Plants. — It is said, 
that it has been tried with success in Holland to manufacture 
paper of marine algae. We have not seen this paper, and are 
unable to sav any thing with certainty upon the subject ; but 
we entertain no doubts regarding the success of such an under- 
taking, provided it were conducted by proper hands. The te- 
nacious texture, and the nature of these plants, seem to render 
them well adapted for this purpose. 
49. Sptritous Solution of Copal . — From numerous experi- 
ments, the Sieurs Bravi and Wilhelm, distillers of spirits at As- 
ehaffenbourg, have found out a spirit which possesses the facul- 
ty of dissolving copal without the aid of heat, and, in general, 
without any solvent vehicle. This spiritous solution of copal has 
a twofold advantage, inasmuch as it not only gives a shining lus- 
tre to articles of wood, horn, metal, pasteboard, &c. but also pre- 
serves this property in them, and insures them a permanent beau- 
ty, without even forming cracks, which is an inconvenience inci- 
dent to every sort of varnish. It is employed like other varnish, 
being applied lightly to objects, by means of a pencil. It dries 
quickly ; and very little is requisite to cover a pretty considera- 
ble surface. It is to be observed that this copal varnish does 
not admit of any mixture. It having been for a long time in 
use among artists, sufficiently attests its good qualities, and ren- 
ders it unnecessary for us to recommend it. It is sold by the 
manufacturers themselves, in bottles and half bottles, at a very 
moderate price. 
50. Very strong Leather for Harness and other Saddlery 
work. — In Poland and Russia, the twisted leather which they 
make themselves is preferred to every other kind for harness. 
For making this leather, dried cow-hide is taken ; the hair is re- 
moved by means of boiling water, and a sort of scraper ; it is 
then cut into long straps, which are sewed end to end ; the two 
extremities of the long strap thus formed are then stitched to- 
gether, and the strap thus becomes double. In this state it is 
impregnated with fatty substances made warm ; it is then sus- 
pended by a hook to the roof, and weights attached to its lower 
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