The JotTRNAt bWOoMPiuATiVE PsTCHOLOQT wiU accept for publication, studies which 

 contribute to out kpipwleflge of mental function and behavior in any organism. 



Manuscripts may be sent to Knight Dunlap, The Johns Hopkins University, Baltimore, 

 Md.; to Robeyt M. I'ieTl^a, 1701 Massachusetts Ave., N. W., Washington, D. C; or to any 

 other member of the editorial board. 



Twenty-five reprints of articles will be furnished gratis to contributors when ordered in 

 advance. An order slip, with table of cost of additional reprints, is sent with proof. 



The Journal of Comparative Psychology is published every other month, appearing 

 February, April, June, August, October and December. At present, one volume of approxi- 

 mately 500 pages is issued a year. Subscription is by the volume only, and not by the 

 year. The Behavior Monographs are issued irregularly. 



Correspondence concerning business matters should be addressed to Williams & 

 WiLKiNS Company, Publishers of Scientific Journals and Books, Mount Royal and Guil- 

 ford Avenues, Baltimore, U. S. A. 



Subscription Price: Current Volume; Volume II, United States and dependencies, 

 Mexico, Cuba, $5.00; Canada, $5.25; other countries, $5.50. These rates apply also to the 

 Behavior Monographs. Prices are net, postpaid. Foreign subscriptions to the current vol- 

 ume accepted at par of exchange. 



Back Volume: Vol. I: Price, $6.00, United States, Mexico, Cuba; $6.25, Canada; $6.50 

 other countries. Prices are net, postpaid. 



Back Volumes: Complete sets of Psychobiology (Volumes I and II), of the Journal of 

 Animal Behavior (Volumes I to VII, inclusive) and of the Behavior Monographs (volumes 

 I to IV), may be obtained from the publishers of the Journal of Comparative Psychology 

 at the price of $5.00, United States and dependencies, Mexico and Cuba; Canada, $5.25; other 

 countries, $5.50 per volume. Prices are net, postpaid. Foreign subscriptions to the back vol- 

 umes accepted at the current rate of exchange. 



Single Volumes, when available, may be obtained at $5.00 a volume. The complete 

 sets are not broken to supply single volumes. 



Subscriptions are received at the following addresses: 



For Argentina and Uruguay: Beutelspacher & Cia,, Sarmiento 815, Buenos Aires, 

 Argentina. 



For Australia: Angus & Robertson, Limited, Sidney; Stirling & Co,, 317 Collins St., 

 Melbourne, 



For Belgium: Henri Lamertin, 58 Rue Coudenberg, Bruxelles. 



For the British Empire, except Australia and Canada : Order from your own agent, 

 or from any British bookseller, or order direct from the publishers. 



For Canada: Wm. Dawson and Sons, Ltd., 87 Queen Street, East, Toronto, Canada. 



For Denmark: H, Hagerup's Boghandel, Gothersgade 30, Kovenhavn. 



For France: Emile Bougault, 48, Rue des Ecoles, Paris, 



For Germany: R, Friedlander & Sohn, Buchhandiung, Carlstrasse 11, Berlin, NW. 6. 



For Holland : Scheltema & Holkema, Rokin 74-76, Amsterdam, Holland. 



For Japan and Korea: Maruzen Company, Ltd. (Maruzen-Kabushiki-Kaisha), 11 to 16 

 Nihonbashi Tori-Sanchome, Tokyo; Fukuoka, Osaka, Kyoto, and Sendai, Japan. 



For Spain: Ruiz Hermanos, Plaza de Santa Ana, 13, Madrid. 



For the United States and other countries except as above : Williams & Wil- 

 KiNs Company, Mount Royal and Guilford Avenues, Baltimore, U. S, A, 



No claims for copies lost in the mails will be allowed unless such claims are received 

 within 30 days (90 days, foreign) of the date of issue. Claimants must state that the publi- 

 cation was not delivered at their recorded address. The publishers will not be responsible 

 for loss due to change of address unless notification is received at least one week in advance 

 of issue. 



