i 



USEFUL PRODUCTS FROM COAL. 333 



., 2^0. 2. — Is the same oil or spirit, a little more rectified* 



No. 3. — The same, still farther rectified, and of course 

 more clear, and freer from smell; but I find, that the spe- 

 cimen, No. 1, answers quite as well for varnish. 



Tar-spirit is now about eight shillings per gallon, and tur- Priceof thctar- 

 pentine-spirit about fifteen shillings, this latter has been, ^^'"'• 

 within the last two years, as high as forty-eight shillings 

 per gallon, and the tar-spirit will answer equally as well 

 for varnish, as you will observe by the enclosed certificate 

 from Mr. Le Resche, on using the coal-tar-spirit, instead 

 of the turpentine spirit. 



I requested Mr. Le Resche to use the tar-spirit just in it is preferable 



the same way he would the foreign spirit, and then give the ^°°'! °^l'-^^- 



•' or? o pentine for var- 



varnish to his work-people to use, without making any re- nish. 

 mark to them, which was done : he, making the varnish 

 himself, found it mixed, and made the varnish as good ia 

 appearance as that prepared with the foreign spirit. He then 

 gave the varnish to his work-people to use, and when they 

 had finished their work with it, he found from their report, 

 that it answered perfectly, and dried sooner; and when the 

 waiter done with it was given to the polisher, it was found 

 to polish much smoother under the hand, and take a more 

 beautiful gloss than their former varnish, as the article now 

 sent will. show on inspection. 



I am of opinion, that the production of these articles will Coal-tar supe- 

 be of great public service. Permit me to add, that the tim- "°^ ^^"^ ^^'^*- 

 ber of ships paid with this tar is not nearly so liable to be 

 worm-eaten as those done with common tar. 

 I remain. Sir, 



Your humble Servant, 

 B. COOK. 



The following Certificate was received from Mr. Le Resche, 

 who prepared and applied the Varnish of the Waiter sent 

 to the Society. 



THIS is to certify, that the spirit or oil, extracted from Testimony of 



, , , ,, r u- u •* Mr, Le llcsche. 



coal-tar, is every way adequate to the purpose for which it 



is intended, as a substitute for the foreign spirit or oil used 



in japanning. 



Mr. 



