1851.] OF THE ROYAL INSTITUTION. 97 
The speaker described the presence of Ozone in the atmosphere, 
the mode of testing its presence, and the probable effects it produced 
there. He referred to Schénbein’s recent experiments on the insu- 
lation of the oxygen of the air and the peculiar effects produced by 
this action. He showed by experiments the more recent results of 
the association of oxygen by light with oil of turpentine and other 
bodies ; and the production of bleaching compounds vying with 
the hypochlorite of lime in energy. He made it manifest by experi- 
ment, that when ether vapour is mixed with air, and a hot platina 
wire or glass rod introduced, the ether in becoming partially 
oxidized to produce acid, also produces Ozone, the results bleaching 
indigo powerfully ; and he stated that sulphurous acid, ether, tartaric 
acid, and many other substances which being first mixed with 
air or oxygen were then exposed to sunlight, exerted bleaching 
powers often of a very high degree. The evening concluded with 
the expression of certain theoretical expectations, or rather possibili- 
ties, which were put forth as indicating the probable fertility and 
importance of the subject, and fitted to excite such philosophers as 
were engaged in the consideration of the physical qualities of the 
particles of matter to examine how far the phenomena of Ozone 
might be carried onward in the illustration and extension of their 
researches. 
In the Library were exhibited : — 
Studies of Light and Shade (Views in Switzerland,) exemplifying one 
of the rapid modes employed by Artists to convey the impressions 
they have received to paper or canvas; and which remains as a 
reminiscence of their first ideas while they are engaged in com- 
bining form, light, shade, and colour into one harmonious whole 
[by G. Barnard, Esq. ] 
A (so called) Blind Fish, and a kind of Lobster from a Mammoth 
Cave in Kentucky, United States. — Dr. Wyman, in the American 
Journal Natural Sciences for 1843, has described a (blind ?) fish 
which he thinks analogous to but not identical with the Ambly- 
opsis Spelzeus described by Dr. Dekay in the Fauna of New York. 
Professor Owen (Lectures on Comparative Anatomy, Vol. II. page 
175.) has given a plate of the brain of the Amblyopsis Speleus 
{by G. Macilwain, Esq. M.R.I., &c.] 
Photographs (by Dr. A. Taylor) from Negatives taken on the spot 
(those in Paris by Mr. Mayall, those in Upper Egypt by Mr. 
Spencer Wells) [by Dr. A. Taylor, M.R.I. &c.] 
Specimens of Malachite (Carbonate of Copper) from an open cavern 
at the surface of the ground, near Ambrix on the Western (Congo) 
Coast of Africa, exhibiting the manner of the formation of the 
Mineral as a Stalactite [by C. B. Mansfield, Esq. M.R.I.] 
Magnetic Stone found at Sangor, Central India [from the Museum 
of Economic Geology]. 
