380 Scientific Intelligence. [May, 
The lyas produces the ichthyosaurus. 
Some parts of another animal not described ; a fish with rect- 
angular scales, and one in which the scales have that form only 
towards the head. 
The nautili and ammonites are numerous. 
Pentacrini are also found. 
Trochi occur rarely. 
Casts of turbinated shells more common. 
Pectens, gryphites, anomie, and. other bivalves, in great 
abundance. 
The fossils of the green sand are numerous. 
ArTic.e VIII. 
SCIENTIFIC INTELLIGENCE, AND NOTICES OF SUBJECTS 
CONNECTED WITH SCIENCE. 
I. New Acid of Sulphur. 
Gay-Lussac and Welther have discovered a new acid combi- 
nation of sulphur and oxygen intermediate between sulphurous 
and sulphuric acid, to which théy have given the name of 
sulphurin acid. If we consider sulphurous acid as a compound 
of four volumes sulphur and four volumes oxygen gas, sulphuric 
acid will be a compound of four volumes sulphur and six volumes 
oxygen. Hence itis probable that this intermediate acid will be 
a compound of four volumes sulphur + five volumes oxygen. 
The sulphurin acid is obtained by passing a current of sulphur- 
ous acid gas over the black oxide of manganese. A combination 
takes place; the excess of the oxide of manganese is separated 
by dissolving the sulphurinate of manganese in water. Caustic 
barytes precipitates the manganese, and forms with the sulphurin 
acid a very soluble salt, which crystallizes regularly, like the 
nitrate or muriate of barytes. Sulphurinate of barytes being thus 
obtained, sulphuric acid is cautiously added to the solution, 
which throws down the barytes, and leaves the sulphurin acid 
in the water. This acid may be concentrated very considerably 
without any loss. 
Il. New Compound of Oxygen and Hydrogen. 
Thenard in the course of his experiments on the oxygenized 
acids,* &c. is stated to have placed beyond a doubt the exist- 
ence of a new compound of oxygen and hydrogen, consisting of 
two atoms of oxygen and one of hydrogen. It is a fluid less 
volatile than water, and soluble in it in any proportion: hence it 
may be obtained nearly free from that liquid by placing the 
* See the present volume of the dnnals, p.1. 
