(1):
(n.) Short for Cogreve rocket, a powerful form of rocket formerly used in war, either in the field or for bombardment. In the former case it was armed with shell, shrapnel, or other missiles; in the latter, with an inextinguishable explosive material, inclosed in a metallic case. It was guided by a long wooden stick.
(2):
(n.) Short for Congreve match, an early friction match, containing sulphur, potassium chlorate, and antimony sulphide.