derwent a slow
fermentation, with the formation, on the superficies, of green must;
during the same period of time, and placed under the same conditions,
a similar glucose solution underwent no change whatever.

By the use of his ozone bottles Polli believed that he had supplied a
means most suitable for directly destroying in the air miasmatic
principles, without otherwise interfering with the respiratory
functions. The ozonized air had neither a powerful nor an offensive
smell, and it might be easily and economically made. The smell of
ozone was scarcely perceptible, and was far less disagreeable than
chlorine, bromine, and iodine, while it was more efficacious than
either of these; if, therefore, its application as a purifier of a
vitiated air succeeded, it would probably supply all the exigences of
defective ventilation in crowded atmospheres. In confined places
vessels might be placed containing mixtures of permanganate of potassa
or soda and acid in proper quantities, and of which the duration of
the action was known; or sulphuric acid could be dropped upon the
permanganate.

This idea of applying ozone was no doubt very ingenious, and in the
bottles before us on the table, which have been prepared in Hastings
by Mr. Rossiter, we see it in operation. The disadvantages of the plan
are that manipulation with strong sulphuric acid is never an agreeable
or safe process, and that the ozone evolved cannot be on a large scale
without considerable trouble.

In 1875 Dr. Lender published a process for the production of ozone. In
this process he used equal parts of manganese, permanganate of potash,
and oxalic acid. When this mixture is placed in contact with water,
ozone is quickly generated. For a room of medium size two spoonfuls of
this powder, placed in a dish and occasionally diluted with water,
would be sufficient. As the ozone is developed, it disinfects the
surrounding air without producing cough.

Lender's process is very useful when ozone is wanted on a limited
scale. We have some of it here prepared by Mr. Rossiter, and it
answers exceedingly well; but it would be impossible to generate
sufficient ozone by this plan for the large application that would be
required should it come into general use. The process deserves to be
remembered, and the physician may find it valuable as a means by which
ozone may be medically applied, to wounds, or by inhalation when there
are foetid exhalations from the mouth or nostr