. The Intellectual observer. star inDelphinus. 20h. 30m. + 15° He noticed it as of 86 24th October, 1863, by the end of December it had fallen to 12 mag.; onJuly 29th this year it was 132 mag., on August 21st 9-4 mag., on September 58*4 mag. The Lampteis Itaxica.—M. Carus states the luminous matter of this insectceases to shine when dried on a plate of glass; but regains its lustre once or twiceif wetted with water. Fermentation op Wine.—M. Berthelot finds that the skin of grapes bearson its surface not only spores of ferments, but often actual globules, and henceferme
. The Intellectual observer. star inDelphinus. 20h. 30m. + 15° He noticed it as of 86 24th October, 1863, by the end of December it had fallen to 12 mag.; onJuly 29th this year it was 132 mag., on August 21st 9-4 mag., on September 58*4 mag. The Lampteis Itaxica.—M. Carus states the luminous matter of this insectceases to shine when dried on a plate of glass; but regains its lustre once or twiceif wetted with water. Fermentation op Wine.—M. Berthelot finds that the skin of grapes bearson its surface not only spores of ferments, but often actual globules, and hencefermentation is easily excited as soon as the grapes are crushed, notwithstandingany precautions to exclude germs floating in the air. Proposed Solar Eye-Piece.—In a communication published in the MonthlyNotices, Sir J. Herschel proposes that the sun should be viewed through a fineslit in a disk revolving sufficiently often to give continuous vision, only a smallportion of the suns light and heat would then affect the SOUTH AM Illustrating Mimetic Analogy. i. Leptahs Nehen Sails Theonoe, var. Leucoi 2a. Ithomia Ilerdina. THE INTELLECTUAL OBSERVER. DECEMBER, 1864. MIMETIC ANALOGY. BY W. B. TEGETMEIER.(With a Coloured Plate.) The theory of mimetic analogy is one that endeavours toaccount for a large and extensive series of phenomena thathave long been known to observant naturalists. The pheno-mena themselves are indisputable, but hitherto no satisfactoryexplanation has been offered to account for their existence. By mimetic analogy is meant the fact that one animal oftenpossesses a very close resemblance to some other animal,which is most frequently of a very distinct group. Sometimesthe object mimicked is an inanimate one—a stone, a bud, aleaf, or a broken twig. Instances of this latter kind of re-semblance are so common as to strike even the most casualobserver. The greater number of animals assume moreor less closely the colour and appearance of the objects withwhich
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