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The appliances for the
practical teaching of chemistry in the Sussexville Proprietary School, as
in most small schools in this country, are characterised by a severe
simplicity. They are kept in a small cupboard standing in a recess, and
having about the same capacity as a common travelling trunk. Plattner,
being bored with his passive superintendence, seems to have welcomed the
intervention of Whibble with his green powder as an agreeable diversion,
and, unlocking this cupboard, proceeded at once with his analytical
experiments. Whibble sat, luckily for himself, at a safe distance,
regarding him. The four malefactors, feigning a profound absorption in
their work, watched him furtively with the keenest interest. For even
within the limits of the Three Gases, Plattner's practical chemistry was,
I understand, temerarious.
They are practically unanimous in their account of Plattner's proceedings.
He poured a little of the green powder into a test-tube, and tried the
substance with water, hydrochloric acid, nitric acid, and sulphuric acid
in succession.


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