Linked from
The 7 pages that link to Bunsen burner, each with the reason it gives.
Flame testRelated: Its non-luminous flame provides a controlled heat source for the test.
DeflagrationBroader topic: Its premixed flame provides a familiar example of deflagration.
SpectroscopeRelated: Its relatively clean flame made emission colors and lines easier to examine.
BlowtorchRelated: Its adjustable air inlet illustrates premixing behind a hot, clean flame.