390 PROCEEDINGS OF SECTION B. 
some future time it is intended to make a more complete 
examination of this sediment, as there is sufficient for a quanti- 
tative analysis. 
The sulphur was carefully tested for selenium, but none was 
found to be present; neither did this residue contain either 
arsenic or phosphorus. 
The supernatant liquid was filtered off from the mud after 
allowing the specimen to stand for two or three days; the 
filtrate had a strong smell of sulphurous acid, and strongly 
reddened blue litmus paper, showing the presence of free acid, 
and, on exposure to the air, soon became milky from the separa- 
tion of sulphur. 
On evaporating the filtrate down to dryness in a platinum 
dish over a water bath, a pale brownish residue was left, which 
rapidly absorbed moisture. On ignition, it intumesced strongly, 
and gave off dense white acid fumes (of sulphur trioxide), the 
ignited residue being yellow when hot and brown when cold. 
The weighings gave— 
Loss onignition ... ... 9°63 parts per 1000 
Fixed solids DN Inpeaajor af 4 
Total solids Ho axUdeelioou vs 
The chlorine and sulphuric acid were not determined in this 
sample. The fixed solids left, on ignition, were found to contain 
both soluble and insoluble silica—suflicient of the former to 
gelatinise with hydrochloric acid—much iron, mainly present in 
the original water in the ferrous condition, some magnesia, lime, 
and a considerable quantity of sodium chloride. Lithium was 
sought for, but no indication of it was obtained, although the 
other three samples gave the lithium band most readily. 
SampLtE No. 2.—lLabelled “ Hot Springs, Seymour Bay, 11th 
November, 1888. Water after Boiling.” Contained in an 
ordinary pickle bottle. 
This also showed a large amount of a powdery yellow sediment, 
about 10 per cent. perhaps, which consisted mainly of free sulphur. 
The water contained a good deal of free sulphuric acid, and on 
evaporating down to dryness over a water-bath, the residue 
blackened from the action of the free sulphuric acid upon the 
organic matter present, and on ignition copious fumes of sulphur 
trioxide were evolved. Much gelatinous silica was left, together 
with iron, lime, magnesia, and soda. This residue showed a well- 
marked lithium band. ; 
‘The iron was present in the original water mainly in the 
ferrous. state. 
