386 Brandy from Fotaioeb-, 



Illation of the oxy-muriate of lime. The following results,, 

 obtained with several samples, show the great value of this 

 method— exhibiting the quantity of oxy-muriate of lime used 

 to destroy its colour. 



Precipitated and sublimed indigo, - - 140 grains. 



Flora indigo, - - - - - 70 



Another sample, . - _ » » 70 



Two other indigos, . » - „ QQ 



Two other samples, - . „ . SO 



Another sample, ----- 40- 



Another sample, - - - - - 30 or 35<, 



Mr. Dalton is of opinion that to destroy indigo by oxy- 

 muriatic acid, twice the quantity of oxigen is necessary 

 that is required to revive it from the lime solution.' — Abridg- 

 ed from Manchester Memoirs, New Series, Vol. IV pp«437-— 

 439. 



24. Bois de Colophane. — In the woods of Mauritius there 

 13 a tree called the Bois de Colophane, and supposed to be a 

 Bursera. From the slightest woun.i in the bark of this tree^ 

 there issues a copious limpid oil, of a pungent turpentine 

 odour, which soon congeals to the consistence of butter, as- 

 suming the colour of camphor Like camphor also, it burns 

 with a vivid flame, and leaves no residuum. 



25. Siemen's improvement on the process of making hrnndy 

 from potatoes. — The potatoes are put into a close wooden 



▼essel, and exposed to the action of stean), which heats them 

 more than boiling water. They can thus be reduced to a 

 state of the finest paste with the greatest facility, it being 

 necessary only to stir them with an iron instrument funiished 

 with cross pieces. Boiling water is then added to the paste, 

 and afterwards a little potash, rendered caustic by quick lime. 

 This dissolves the vegetable albumen, which opposes the 

 complete conversion of the potatoe starch into a fluid. Pro- 

 fessor Oersted frees the potatoe brandy from its peculiar fla- 

 vour by means of the chlorate of potash, which is said to 

 make it equal to the best brandy made from wine. 



QiWs Tech. Repos. M. 29, p. 322. 



