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Show I THE GLOW WORM Your little ho hrinps into tlie house the first "lightning bin?' he ha oauf?ht iliis season and asks: ' What makrs the lightning bur light?" Ami you scratch your lioad and, if you are a candid father, you admit yon don't know lint a good way io enlarge your education is to look up the correct answers to 'h' questions of your children that you can 't answer. So when the boy is out of the room yon surreptitiously consul! an encyclopedia and under "Glow Worm yon fiud revealed the mosl wonderful f our summer mysteries Yon diseover that the light of the plow wnrm, or "Jightning hup" phosphorescent and is produced by fatty cells io which run main infinitesmal tubes that tarry oxvpen which reacts on the pirns phorous and makes the lipht. Yon find. too. that the lightning hup is the most perfect of illn minatinp plnnt Man has produced lipht in various forms, but still j has to make lipht without heat, as the lightning Imp has been doing for ages All the energy of the lightnmp bug i used for lipht and none is wasted in beat. It is interesting also to note that the lightning bug produces 36 flashes every minute and, comparatively speaking, no Creature works so hard and BO sleadilv to perform its mission. Indeed, in southern countries and in some parts of Canada, a. cousin of our lightning bug is used . wayfarers to light the paths through dark forests al night. But there is one question .nt boy will ask that no encyclopedia answers. Why did God make lightning bugs? It must have been j for the preater plory of summer nights. |