The Entomologist's record and journal of variation . m ourIgnis fattens I forbear to quote them. Both these observers were ofopinion that the flames were due to a spontaneous ignition of gas arisingfrom decomposing vegetable matter; and since one of them described theappearances as a succession of flashes carried along always in the samestraight line and in the direction of the wind it is possible that thesephenomena were caused by the successive ignition of a large numberof contiguous small puffs of an inflammable gas issuing from the manner in which the first puff became ignited i
The Entomologist's record and journal of variation . m ourIgnis fattens I forbear to quote them. Both these observers were ofopinion that the flames were due to a spontaneous ignition of gas arisingfrom decomposing vegetable matter; and since one of them described theappearances as a succession of flashes carried along always in the samestraight line and in the direction of the wind it is possible that thesephenomena were caused by the successive ignition of a large numberof contiguous small puffs of an inflammable gas issuing from the manner in which the first puff became ignited is not explained. There are three indisputable facts—indisputable because they arebased on certain fundamental physical laws which prevail on this earth—which rule out, quite definitely, any supposition that the Ignis fatuusis an ignited gas. They will all have occurred to the reader who hasread and pondered upon the preceding instalment of this article and hewill have felt no less astonishment than I have that such an hypothesis VOL. 77 PLATE V. GRYLLOTALPA iTAUA Linn Above : Malt Below ; Female are life-size
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