Dr. H. T. Stetson will conduct an Astronomical Colloquium at 8 P. M. this evening in the Astronomical Laboratory on Jarvis street. The subject will be "The Determination of Star Diameters: Michelson's Work on Alpha Orients."
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Dudleian Lecture Tomorrow 
         
     
     
     
     
     
     
     
                         
                         
                         
                        