collodion pictures, 181.
collodion process, 41. 42. 46.
cyanuret of potassium, 157.
developing mixture, 549.
Dr. Diamond's collodion process, 41. 133.
—— lecture on the calotype process, 596.
engraving, 628.
gallo-nitrate of silver, 17.
glass chambers, 133.
iodizing paper, 46.