Extra copies of the MAGNETRON AS A GENERATOR OF CENTI- 

 METER WAVES by Fisk, Hagstrum and Hartman, the sole article com- 

 prising this issue of the Bell System Technical Journal are available at 

 $1.00 per copy. 



Because circumstances have delayed the issuance of this number of the 

 Bell System Technical Journal far beyond its designated date of appearance, 

 it seems desirable to record that issuance actually occurred on July 16, 1946. 



