THE USE OF A ROTATING ANODE IN THE ELECTRO- 

 LYTIC PRECIPITATION OF URANIUM AND 

 MOLYBDENUM. 



By EDGAR T. WHERRY and EDGAR F. SMITH. 

 [Contribution from the John Harrison Laboratory of Chemistry.] 



(Read November 3, 1906.) 

 I. Uranium. 

 The early suggestion of Smith (Am. Ch. Jr., i, 329) that uranium 

 could be completely precipitated by the current from an acetate 

 electrolyte has been amply verified, and the purpose of these lines 

 is only to record the conditions under which the deposition takes 

 place when using a rotating anode. The salt applied in the experi- 

 ments was uranyl sulphate. The form of apparatus and mode of 

 rotation have been fully discussed in the numerous communications 

 from this laboratory relating to the rapid precipitation of metals. 

 It will not be necessary either, to comment further upon the form 

 in which the uranium is precipitated or upon the subsequent treat- 

 ment of the deposit. These points have been sufficiently dwelt 

 upon in earlier communications.^ 

 The results and conditions are : 



^ Smith's " Electrochemical Analysis," p. 94. 



268 



