Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . mages weretransmitted to the brain, to be united, either byoptical or mental combination, into a single picture. great number of inverted partial images. Howthen can insects and crustaceans see with theircompound eyes ? Midler answered that each facettransmits a small pencil of rays travelling in thedirection of its axis, but intercepts all others. Therefractive lens collects the rays, and the pigmentedas well as refractive crystalline cone farther con-centrates the pencil, while it
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . mages weretransmitted to the brain, to be united, either byoptical or mental combination, into a single picture. great number of inverted partial images. Howthen can insects and crustaceans see with theircompound eyes ? Midler answered that each facettransmits a small pencil of rays travelling in thedirection of its axis, but intercepts all others. Therefractive lens collects the rays, and the pigmentedas well as refractive crystalline cone farther con-centrates the pencil, while it stops out all rayswhich diverge appreciably from the axis. Eachelement of the compound eye transmits a singleimpression of greater or less brightness, and thebrain combines these impressions into some kind ofpicture, a picture like that which covdd be producedby stippling. It may be added that the movementsof the insects head or body would render the distanceand form of every object in view mucli readier ofappreciation. No accommodation for distance wouldbe necessary, and the absence of all means of accom-.
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
