186 
There is generated by the action of water on these basic 
ammoniacal compounds, an oxychloride of zine of a very re- 
markable character : it is— 
zncl +6 zno 4 12 Ho. 
dried, it is reduced at 212° to 90 + and by 300° to 6 Ho. 
By 500° all water is driven off, and there remains zz cl + 6 
zno which exposed to the air absorbed 3 Ho. Hence the 
general expression is 
zncl + 6zn0 + 3HO +3 HO +3Ho +3 HO 
and comparing some similar chlorides, there is, 
1 ca.cl + Guo crystallized chloride of calcium. 
2 ancl + 6zn0 — basic chloride of zinc dry. 
3 u cl+6Ho — strong muriatic acid. 
4 ancl +6zn0 + 12 Ho — hydrated oxychloride of zinc. 
5H cl+6uno0 +12 HO — muriatic acid with a constant 
boiling point. 
. Another oxychloride, having the composition 
zncl +9 zno0 + 15 HO 
which dried and exposed to air, absorbs 6 Ho. Hence it 
may best be considered as 
(zn cl + 6 zno + 120) + 3 (zn 0 HO), 
giving ultimately 
(zn cl +6 zn 0 4+- 3 HO +3 (zno + HO) 
Mr. Petrie then read the following Report, from the 
Committee of Antiquities :— 
At a meeting of the council, on Monday last, the Presi- 
dent read the following letter, which he received from Mr. 
Drummond, the Under Secretary of State. 
Dublin Castle, May 19, 1838. 
‘‘ My DEAR SIR, 
“J am informed, that in levelling a 
mound in the Pheenix Park, on the eastern flank of the 
