ADVERTISEMENT TO REVISED EDITION. 



THE edition of the Smithsonian Physical Tables issued in 1896 having 

 become exhausted, a careful reexamination of the original work has been made 

 at my request by the author, Professor Gray, and the few changes found neces- 

 sary have been made in the plates. 



S. P. LANGLEY, 



Secretary, 



SMITHSONIAN INSTITUTION, 

 WASHINGTON CITY, October jo, /<?97> 



ADVERTISEMENT TO SECOND REVISED EDITION. 



THE revised edition of the Smithsonian Physical Tables issued in 1897 

 having become exhausted, and the demand continuing, a second revised 

 edition is now issued. The author, Professor Gray, has again examined the 

 work and made a few corrections in the plates, table 283 in particular being 

 rewritten to agree with the recent report of the International Committee on 

 Atomic Weights. 



S. P. LANGLEY, 



Secretary. 



SMITHSONIAN INSTITUTION, 

 WASHINGTON CITY, January^ 1903. 



ADVERTISEMENT TO THIRD REVISED EDITION. 



The second revised edition of the Smithsonian Physical Tables issued in 

 January, 1903, having become exhausted, and the demand for the work 

 continuing, a third revised edition is now published, in which the author 

 has made a few corrections to agree with the latest researches. 



S. P. LANGLEY, 



Secretary. 

 SMITHSONIAN INSTITUTION, 



WASHINGTON CITY April, 1904. 



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