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POPULAR SCIENCE MONTHLY. 



lies of Synontognathous and their Nomenclature ; 

 No. 1052. On the Application of the Name Teu- 

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 October 28, 1895). Walker. S. T. : The Modicum 

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Byars, William Vincent. The Glory of the 

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Chappie, J. M. The Minor Chord. Chicago : 

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Conant, C. A. A History of Modern Banks of 

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Keyes, C. R. The Origin and Relations of 

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Smith, Oberlin. Press-working of Metals. 

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tfmorajettts xxt g>tizxiz* 



Mysterious Fractures in Steel. The so- 

 called mysterious fractures in steel, with 

 which every engineer is familiar, bid fair to 

 become things of the past. The following 

 facts, taken from a recently reported analy- 

 sis of specimens from a fractured steam- 

 ship " tail shaft," are especially interesting, 

 as showing the great value of investiga- 



tions which at first sight may seem entirely 

 barren of anything but theoretical interest. 

 This accident, which a few years ago would 

 have been put down as one of those " mysteri- 

 ous breaks," probably due to " fatigue," the 

 shaft having been in practically continuous 

 use for twelve or fourteen years, was fully 

 explained by the subsequent examination. A 



