REMOVE

1. Chemistry
2. Spectrum analysis
3. 1871?

WHAT

1. Physics (2)
2. Astrology (1)

WHERE

1. England: Greater Manchest … (2)

WHO

1. Huggins, William, Sir, 18 … (1)
2. Roscoe, Henry E. (Henry E … (1)

WHEN

1. 19th Century CE (2)