Wet collodion : is a much improved calotype developed by Frederick Scott Archer. A sensitized glass plate was dipped into a bath of silver nitrate and exposed while still wet. The improved speed made much shorter exposures possible.
Deoxyribonucleic Acid [DNA]
Deoxyribonucleic acid is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many viruses. DNA and RNA are nucleic acids; alongside proteins, they compose the three major macromolecules essential for all known forms of life.