"First a piece of glass he coated
With Collodion, and plunged it
In a bath of Lunar Caustic
Carefully dissolved in water;
There he left it certain minutes.
Secondly my Hiawatha
Made with cunning hand a mixture
Of the acid Pyro-gallic,
And the Glacial Acetic,
And of alcohol and water:
This developed all the picture.
Finally he fixed each picture
With a saturate solution
Of a certain salt of Soda...."