REMOVE

1. Combustion

WHAT

1. Chemistry (2)
2. Coal (1)

WHERE

1. England: Greater Manchest … (3)

WHO

1. Core, Thomas H., 1836-191 … (1)
2. Odling, William, 1829-192 … (1)
3. Roscoe, Henry E. (Henry E … (1)

WHEN

1. 19th Century CE (3)
2. 1873? (2)
3. 1871? (1)