Edinburgh Dissection of tk§ Brain. 153 



stands all the chemical agents that blacken other white pigments 

 used in japanning. It is obtained in the following manner: 



Let some artificial carbonate of barytes (obtained by decom- 

 posing or pouring into a solution of native carbonate of barytes 

 a saturated solution of subcarbonate of ammonia) be ground up 

 with a sufficient quantity of white oil varnish, and apply it sue- 

 cessivelv upon the leather. This being done, the finishing coats 

 are given to the article with a japan composed of carbonate of 

 barvtcs ground up with white copal varnish ; and when perfectly 

 dry, the leather is polished with a piece of felt and finely levi- 

 gated pumice-stone powder, and the last or finishing polish is 

 applied by means of a sponge or soft brush and burnt hartshorn 

 powder. 



Yellow Japan. — To ohtain a clear transparent yellow, the 

 leather nuist of course be white, and a yellow dye is given to it 

 by means of woad or French berries and alnm ; and when per- 

 fectly dry the japan ground of patent yellow is applied in the 

 maimer above stated. 



Red Japan. — For this purpose the base of the japan ground 

 must be made up with madder lake ground up with oil of turpen 

 tine ; this forms the first ground. When perfectly dry, a second 

 coat must be applied, composed of lake and white copal varnish; 

 and the last, with a coat composed of a mixture of copal and 

 tnrpentine varnish ground up with lake. 



Blue Japan. — The first coat must be given with artificial car- 

 bonate of barytes ground up with oil varnish ; the second with 

 Prussian blue, ground in copal varnish and finished as before 

 stated. 



Black Japan is obtained by applying finely levigated ivoi-y 

 black ground up with linseed oil varnish ; the second coat must 

 consist of the same pigment ground up in copal varnish. 



EDrNBURGH DISSKCTION OF THE URAfN. 



A considerable interest having been excited in Edinburgh for 

 some time past, about the discoveries of Gall and Spnrziieim, 

 relative to tiie structure and functions of the brain. Dr. Spurz- 

 heim at length made a dissection of that organ in one of the 

 anatomical dissecting rooms of the University. Besides the re- 

 gular students UKiuy of the professors were present, as well as 

 other scientific persons interested in tiicse new and important 

 discoveries. Dr.S. succeeded in making the most ]Hrfect dissec- 

 tion of the brain, and received the approbation of tliose who 

 were present. Many |iersons who had previously opposed the 

 new method of dissecting this organ, testified to the superi- 

 ority of Dr. Spnrzhcim's new mode of developing tlie hitherto 

 unexplored structure of the brain and nervous system. 



NEW 



