<human>: Question: What consists of 25 pigmented squares touching a plate below a phosphorescent tablet under the light of a burning Magnesium ribbon?
Answer: The speed of the emulsion was then expressed in 'degrees' Warnerke (sometimes seen as Warn. or °W.) corresponding with the last number visible on the exposed plate after development and fixation.
 Is the question answered in a satisfactory fashion?

OPTIONS:
- yes
- no
<bot>: no