126 Corréspondence of J. Nickles. 
Transformation of woody fibre into Sugar.—On the occasion of f the 
above discussion Pelouze announced the important results which follow. 
Cellulose precipitated from its solution in ammoniacal oxyd of copper by 
a feeble acid, is soluble in dilute chlorohydric acid. Ordinary cellulose is 
soluble in concentrated chlorohydric acid; water forms with this solution 
a precipitate of dazzling whiteness; at t the end of two days the precipi- 
tate ceases to form, and all the callose has ra transformed into sugar 
affording the characteristics of gluco 
The transformation of cellulose into glucose can be effected by a pro- 
‘longed ebullition in water containing a small quantity of sulphuric or 
chlorohydric mate ~~ hundredths); paper, old linen, sawdust, and any 
cellulose more or less pure, can be thus turned into sugar at the end of 
aul hours boilin 
Pelouze thinks that this reaction will become the basis of a new branch 
of industry—one which has often been attempted since Braconnot suc- 
ceeded in 1819 in transforming lignine into glucose; he thinks that the 
transformation would be rendered much more active by operating in a 
close vessel at an elevated temperature 
Lastly, Pelouze announces that, by treating cellulose with caustic po- 
tassa in fusion at a temperature between 150° and 190° C. and dissolving 
the prodnet in water, a substance can be separated from it by acids which 
has the composition of cellulose, but differs ieee it in that it is soluble in 
the cold in alkalies; it changes into sugar in the presence of chlorohydric 
Manufacture of Aluminium.—tThis manufacture, which is becoming 
more and more extended, has just taken two steps onward; one, through 
the publication by H. St. Claire Deville, of a — expressly on the 
subject; the other, by the ee of a pro of soldering. ~ yo 
labors expended on aluminium up to the That of March, 1859, a 
counted by Deville, and as the author and founder of this sndnashectsil 
_With a slip of zine, the adhesion took place with great rapidity as if a 
peculiar electric action gave it an impulse at the moment of contact; but 
this solder also has failed to afford much strength. 
At last it has been suggested that the difficulty might be surmounted 
by previously coating the piece with copper, and then soldering together 
urfaces. In order to effect this, the aluminium, or at least 
the parts to be soldered, are plunged into a bath of acid sulphate of cop- 
The positive pole of the battery is putin direct communication 
per. 4 
with the bath, and the pieces to be coppered are touched with the nega 
tive pole ; the deposit of copper takes place very larly over the sur- 
— of the aluminium. These surfaces thus Kini soldered in the 
way. 
Processes are. 
only a a Bhtorieal interest, gee account of a new and perfect m 
is seen, very imperfect, and they now pe 
ry imperiect, ey see 
