258 
MANUFACTURE OF ACETATE OF LEAD. 
I. II. 
Carbon 67*04 67-11 
Hydrogen .... 7-42 7'58 
This consequently contained much less carbon. It was dissolved 
in dilute muriatic acid, precipitated with ammonia; the precipitate, 
after being washed, recrystallized from alcohol, and analysed, was 
found to have the composition C 20 H 12 NO. Laurent's statements 
appear to be founded on a cinchonine which possibly contained a 
small quantity of ^-cinchonine, the carbon in which is 4 per cent, 
less, very little of which therefore would suffice to lower the car- 
bon equivalents in the formula. 
Of the formulae proposed for cinchonine, that of Regnault 
agrees best with the author's analyses ; they however lead more 
correctly to the formula C 40 H 23 N 2 O 2 , which requires C 78' 18, 
H 7-49, N 9-12, 5*21. The platinum double salt likewise cor- 
responds with this, C 40 H N 2 2 +Cl 2 H 2 -fPt 2 CI 4 . 
Carbon 33- 1 . . 40 33*38 
Hydrogen 3*6 . . 25 3*48 
Nitrogen . . 2 
Oxygen . . 2 
Chlorine . . 6 
Platinum . . 2 27*42 
That in this formula there are 2 equivs. of bichloride of platinum 
to 1 of cinchonine, may, according to the author, be explained by 
the fact, that the salt is only formed upon the addition of HC1. — 
Chem. Gaz. March 1, 1851, from Proc. Imp. Acad. Vienna, 1850. 
ON THE MANUFACTURE OF ACETATE OF LEAD, AND ACETIC 
ACID. 
By Jacob Bell, Editor of the (London) Pharmaceutical Journal. 
Acetate of Lead or Sugar of Lead ; Manufacture of the Brown 
Acetate or Pyrolignite of Lead. — The distilled pyroligneous acid is 
saturated with litharge in a tub, and the muddy solution ladled out 
