CARBONIZATION OF TURF. 139 



To produce that preparation of copper, which is called The pressed 

 f. ..i. • * . • -j , . u , , pulp of cider 



verdigris, the remains of certain cider apples might be used, ap pi e s applica- 



after the juice has been pressed out, of which there is a great We to this pur- 

 deal throughout Normandy, that is turned to no account, p * 

 except as a bad kind of fuel. In this case it should be 

 moistened with bad sour cider immediately after it is taken 

 from the press, and put into earthen pots, or little casks, 

 with plates of copper, stratum super stratum; washing the 

 oxided copper with our acid, after it has thus stood a month, 

 and then proceeding according to the method of Mr. Chap- 

 tal. Various wild fruits, as the sloe for example, might be and many w3d 

 used in a similar manner, instead of the refuse of the cider 

 press. 



I am indebted to Mr. B. E. Lef6bure, my friend and 

 countryman, and a zealous cultivator of chemistry, for 

 the first idea of employing the pressed pulp of apples in pre- 

 paring the acetate of copper. 



The facts related in this paper will prove interesting I 

 hope to science, and of some utility to the public; and if 

 I meet with the reader's indulgence, my wishes will be gra- 

 tified.* 



Explanation of the Figures. 

 Plate III. Fig. 1. an interior view of the furnace. Explanation of 



Q, Q', upper part of the furnace. Plate IIL 



M, M', the chimney, the shape of which may be varied. 



B,' W, B^B^other hoops } to stren § then the apparatus. 



L, L, little air holes, to accelerate the combustion at 

 pleasure. 



q', the fire-place closed by a stone with two rings, to ad- 

 mit the introduction of the hook R, fig. 2. 



N, four iron bars forming the grate. 



D D', an iron bar, fastened into the brick work at each 

 end, upon which the bars N slide. 



* The day on which my memoir was received, I was informed 

 by Mr. Vauquelin, that Mr. Lebon, engineer of bridges and high- 

 ways, inventor of the thermolamps, had applied processes nearly 

 similar to mine to the carbonization of wood in his experiments. I 

 conceive therefore it is but justice to say with Mr. Vauquelin, that 

 nothing can be better contrived, than the apparatus of Mr. Lebon. 

 L2 K, the 



