Conversation so far:
What is golgi staining?
Golgi staining was used by Spanish neuroanatomist Santiago Ramón y Cajal to discover a number of novel facts about the organization of the nervous system.
Is black reaction a sickness?
Golgi method was initially named the black reaction (la reazione nera) by Golgi, but it became better known as the Golgi stain or later, Golgi method.

Question: what year did this begin
Self-contained rewrite: What year did Golgi staining begin?