ORGANIC ALKALIES AND IODIDE OP POTASSIUM. 2 
ART. VIII.— SOME EXPERIMENTS UPON THE REACTION 
THAT TAKES PLACE BETWEEN THE SULPHATES OF 
SOME OF THE ORGANIC ALKALIES AND IODIDE OF 
POTASSIUM. 
By S. Lewis, M. D. and Thomas J. Husband. 
Sixty grains of the sulphate of quinia and an equal 
quantity of the iodide of potassium were thrown into four 
ounces of boiling water, and boiled for a few minutes. A 
tenacious substance was immediately formed, and floated 
on the surface of the liquid ; this was collected and the 
remainder set aside. When cold, there was a further coat- 
ing of the above matter on the surface of the fluid, and 
some deposited, also, on the sides and bottom of the vessel. 
This substance was carefully washed and dried by a gentle 
heat ; it weighed fifty -four grains, and presented the 
following characteristics : — It has an extremely bitter taste, 
is of a light straw color, uncrystallizable, very soluble in 
alcohol and ether, cold water dissolves it sparingly, soluble 
in about forty parts of boiling water. 
To ascertain the changes that had taken place, the re- 
maining liquor was evaporated to dryness, and treated 
with several successive portions of absolute alcohol. The 
undissolved portion, when collected and examined, proved 
to be the sulphate of potassa, and weighed twelve grains. 
The alcoholic solution, being non-concentrated by evapora- 
tion, deposited a considerable quantity of saline matter and 
iodide of potassium. The evaporation continued to dry- 
ness, and the dry matter treated with water, and this 
evaporated to dryness, yielded a further portion of iodide of 
potassium ; the whole weighing thirty-three grains. What 
remained after this last treatment with water presented the 
