Selenic acid may be obtained in solution by deflagrating selenium or a selenite with potassic nitrate.
It is also insoluble in alkaline sulphides, with the exception of potassic sulphide.
Purchase that sold as potassic cyanide (gold) which contains about 95 per cent.
The action of both sodic and ammonic cyanides is precisely similar to that of potassic cyanide.
What potassic ferrocyanide was doing on board the Boreal I did not know, and I had neither the means, nor the force of mind, alas!
