234 8S. W. Johnson on Nitrification. 
Specific gravity 7:015—7:112. It appears to contain 10 
chlorine. It gave: 
Tron, fi. 92°096 
Nickel, “604 
Schreibersite, 5000 
’ . 
romium, cobalt, magnesium, phosphorus, races, 
A fine residue of #e Si and C. Neither copper nor tin was found. 
3. Composition of Meteoric Iron from Losttown, Cherokee Con 
Georgia. 
My general description of this iron was contained in vol, 
xlvi, p. 257 of this Journal. Its analysis has afforded me— 
_ Charleston, 8. C. Dec. 29, 1868. 
——_——= 
Arr. XIX.—On Nitrification ;* by 8. W. JouNsON. - 
Formation of nitrogen compounds in combustion.—Saus 
sure first observed (Ann. de Chimie, Ixxi, 282), that in the 
burning of a mixture of oxygen and hydrogen gases in the alt, 
the resulting water contains ammonia. He had previously ne 
ticed that nitric acid and nitrous acid are formed in the same 
process. 
Kolbe (Ann. Chem. u. Pharm., cxix, 176) found that whet 
a jet of burning hydrogen was passed into the neck of an ope? 
bottle containing oxygen, reddish-yellow vapors of nitrous acid 
or nitric peroxyd, were copiously produced on atmospheric at 
becoming mingled with the burning gases. ae 
Bence Jones (Phil. Trans., 1851, ii, 399), discovered mute 
{nitrous ?) acid in the water resulting from the burning of al- 
cohol, hydrogen, coal, wax, and purified coal-gas. Pu 
By the use of the iodid of potassium starch-test Nae 
test), Boettger (Jour. fiir Prakt. Chem., Ixxxv, 396,) 3 
Schonbein (ibid., Ixxxiv, 215,) have more recently confirmed 
result of Jones, but because they could detect neither free 
sod that tae autalt by the ordinary test-papers, they <_< 
ded nae 7 . . 14 jw 8) 
rapid combustion.+ 
* The substance of this : ‘ 
Ni Maencek: Ani Wen ee ee Oe gr ri 
,.. | Nitrous acid does not appear when the combustible contains sulphur, sine? 
re o> iP ures by re 
that, in fact, nitrite of ammonia is generated in all cases of 
