The Meteorites from Canon Diablo, Arizona. The Silver 

 Dollar Seen at the Base of the Larger Meteor 

 Shows the Comparative Sizes. 



veneer of brick wall, has proved so rigid and immovable that not the 

 slightest vibration has been perceived when using the telescope with 

 the highest optical powers, although the heavy cars of the West 

 Adams Street railway line pass the tower within two hundred feet. 



Immediately above the concrete foundation of the steel tower is 

 a basement divided into two sections, one of which is used as a special 

 room for a brilliant exhibit of Radium, composed of a number of 

 highly active radioscopes showing the action of the Alpha rays of 

 Radium. 



A display of 155 star-maps, of which several have been completed, 

 is being prepared. These represent stars from the first to the fifth 



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