Papular Science Monthly 



717 



Siamese Twins Among Trees — A 

 Remarkable Double Growth 



T 



HE twin elm trees shown in the ac- 

 companying photograph have been 

 the dehght of the children of Fostoria, Ohio, 

 for almost one hundred years. The con- 

 necting limb between the two trees 

 furnishes an ideal support 

 swing. The trees are ea 

 about one hundred feet hig 

 with a diameter of two feet 

 at the bottom. The con- 

 necting limb is fifteen 

 inches thick. There is 

 a space of about twelve 

 feet between the trees. 

 Evidently the graft- 

 ing, whether done by 

 Nature, accident, or 

 the hand of man, was 

 accomplished when 

 the trees were ver>' 

 young, for it is now 

 impossible to determine 

 to which tree the con- 

 necting limb originally 

 belonged. 



How Chemists Have 



Taken the Poison Out 



of Common Salt 



AS far as the supply of 

 l\ salt goes there is 

 enough available to last 

 us forever. Michigan alone, it is said, 

 claims to be able to supply the whole 

 world for two thousand years with all the 

 salt it needs. But no matter how plenti- 

 ful salt may be it has the disadvantage of 

 being a poison, for no salt is wholly pure. 

 Thus, if the poison in salt can be elimi- 

 nated vast additional sources will be 

 available. 



Scientists have come to the front and 

 have tackled the problem successfully. 

 By adding a solution of just the right 

 amount of [sulphate of soda, the barium 

 or poison in the salt is changed to sul- 

 phate, and with it is removed the 

 pink or brownish color due to iron 

 salts. Thus is made available an 

 unlimited supply of salt, which 

 means more raw material for our 

 chemical industries, because the 

 barium-bearing salt is used fo*. 

 salting hides, for glazing pot- 

 tery and for making ice. 



The trees are twelve feet apart, 

 about one hundred feet high, and 

 are over one hundred years old 



They Aren't Afraid to Go Home in 

 the Dark in Whitewashed London 



ALTHOUGH London and the outlying 

 l\ suburbs put out street lights at eight 

 o'clock and appear to say "Good night," 

 and the whole country is swallowed up in 

 darkness, the truth is that the Lon- 

 1 theaters and night attrac- 

 tions are as popular as ever, 

 Zeppelins or no Zeppelins, 

 ^'hen first the lights were 

 turned out, the night-owls 

 of London had a difficult 

 time feeling their w^ay 

 about. Curbs, stone 

 steps, iron lamp-posts 

 and other formidable 

 objects felt different 

 than they looked. 

 But it wasn't long be- 

 fore the population 

 got its night eyes. 

 Lights were put on 

 perambulators and 

 bull's-eye lamps on 

 moving vehicles, but 

 soon these proved un- 

 necessary-, so expert did the 

 prowlers become. 



The photograph shows 

 some Leicester ladies white- 

 washing a step for the bene- 

 fit of the night crowd. Not 

 only are steps whitewashec 

 but projecting cor- 

 nerstones, lamp posts, and many 

 other objects which have a habit of 

 getting in the way, 



Int. Filai Serv. 



London Bridge isn't falling down but all London 

 did — until steps and projections were whitewashed 



