0. Rayograms, cyanotypes, blueprints

1. Rayograms, cyanotypes, blueprints

 

Top: (black and white) Man Ray, Rayograph, 1922 and 1926, photograms

Above: Anna Atkins, Cystoseira granulata, Dictyota dichtoma and Anatomized leaves, cynanotypes from Photographs of British Algae: Cyanotype Impressions and Cyanotypes of British and Foreign Flowering Plants and Ferns.
  
Anna Atkins (1799-1871) was a botanist and photographer. Atkins learnt the process of creating cyanotypes from Sir John Herschel, a friend of Atkins and her father, who invented the cyanotype photographic process in 1842.

 Atkins employed the process with dried algae in Photographs of British Algae: Cyanotype Impressions in 1843, as well as, among other self-published works, the presentation albums Cyanotypes of British and Foreign Ferns (1853), Cyanotypes of British and Foreign Flowering Plants and Ferns (1854).

Her father, John George Children, was also a naturalist and a scientist, and is the namesake of the Australian Children's python, Antaresia childreni. The children's python is known to prey on microbats, dangling from stalactites in caves and catching them mid-air. The genus of the python Antaresia is named after the star Antares.

* see wiki sv. Anna Atkins and longer article here 

Above: Household photo emulsion equipment, from The Light Farm Low Tech Emulsion #1: Hershey's Tornado Emulsion (recipe at thelightfarm)

* see also Van Dyke Brown, chlorophyll prints and whiteprints (or 'bluelines', reverse blueprints that will "fade over a span of months (indoors) or just days (outdoors), becoming illegible")