Chemistry and Physics. 483 
oes lateral tubulures, the necks Sain closed at top, an 
thence through a final drying apparatus into the ub. The flasks 
definite temperatures in a water bath, a a paraffin bath, a bath of 
melted tin (230° C.), of an alloy of tin and lead (290° C. ), of pure 
lead (326°2° C.) and of zine (415°3°C.). The heating in the gas 
current was continued until the weight became constant, the ex- 
periment iene interrupted from time to time, the a yparatus 
allowed to cool, the dioxide displaced by dry air and the flask 
analyzed The results wer ws Barium oxide thou 
beginning to absorb culphurous panei at 200° C., absorbed it 
more rapidly in the tin bath, becoming completely saturated in 
le 
about four weeks. The res ulting product was completely soluble 
in hydrochloric acid, contamed no sulphate or sulphide 
afforded 29°36 per cent SO,, the formula BaSO, requiring 29°49. 
Strontium oxide was less active, the first evidences of absorp- 
tion eee at 230° C., and ee at 290°, a constant 
formula Ca,S,0,,. At higher tempera e gas ab- 
sorbed, but ‘the product split into sachets pane ‘sulphide. her ybove 
sium oxide absorbed the gas at the temperature of melted lead, 
but the operation was so slow that three months passed before the 
weight became constant. Then the product consisted entirely of 
neutral sulphate, the temperature of absorption lying very near 
the temperature of a of the sulphite, ee e Rtg 
Chem. Ges., xiii, 651, April, 
n the Constitution of Soborchue Acid.—The constitution of 
HSO.OH, acid has been regarded as i 8 pane by t sepia 
y with 
potassium ico gives cae 1 ome chloride, bitter 
almond oil and some benzoic ne “To test the qication further, 
advantage was taken of the fact that catpkusend acid forms two 
isomeric ethers so | ne oh and C,H,.S0,0C,H,, the former by 
the action of thionyl chloride on sodium alcoholate, the latter by 
