from The Century Dictionary.
- noun The temperature at which escaping vapor will ignite momentarily, or flash: distinguished from the burning-point, at which the substance will itself take fire and burn: usually said of oils or hydrocarbons. Also
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They are all obviously struck off in moments of excitement -- moments when the writer's variable and fanciful temperament was heated to flashing-point and gave off almost spontaneously these lightnings of prose as it gave, on other occasions, such lightnings of poetry as _The