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[[underlined]] Solutions used [[/underlined]]
(1) Molar solution of copper nitrate. Prepared by adding 188 g. Cu (NO3)2
225 g Cu (NO3)2 * 3H20
[[underlined]] or [[/underlined]] 332 g Cu (NO3)2, 6H20
to 1000 g of water

(2) Strong solution of NH40H (Ca. 12 normal).

[[underlined]]
Technique of Test [[/underlined]]
The specimen is immersed in the nitrate solution in such a way that the polished surface is not against the bottom of the vessel. This can be done in a petrie dish, or similar container, with one corner or edge, of the specimen resting on a small glass plate, rock chip or wooden wedge. If the specimen is thin enough to permit it, it is best to cover the dish to prevent evaporation. Care should be taken that no air bubbles adhere to the surface.
[["36" circled]]

Transcription Notes:
Unsure how to transcribe chemistry (i.e. H20 or Hv2O ?) Special symbol to denote?