JOURNAL OF DAIRY SCIENCE OFFICIAL PUBLIOATION OP TI IE

AMERIOAN DAIRY SOIENCE A S S 0 0 I A T I O N SINCE 1917

E. O. HERREID, E d i t o r - i n - C h i e f , U n i v e r s i t y of I l l i no i s

E d i t o r i a l A d d r e s s : S t a t i o n A , B o x 250, C h a m p a i g n , I l l i no i s

P h o n e : 367-7073 a n d 333~0155

E D I T O R I A L B O A R D

U. S. ASHWOI~TH H . D . EATON R . E . ELY WIhLIA/ff HANSEL Pullman, Washington Storrs, Connecticut Reno, Nevada ithaca, New York

E. L. JACK ROBERT JF_2~N~SS C.K. JOHNS O.W. KAUI~rANN Davis, California St. Paul, Minnesota Ottawa, Canada East Lansing, Michigan

MAPLE KIEENEY F.A. KU~I[MEROW J.E. L~GATES DURWARD OLDS College Park, Maryland Urbana, Illinois Raleigh, N . C . Lexington, Ky.

E . P . R E J ~ W ~ L . H . SCttULTZ M . L . SPNOK R . W . TOUCH.BERRY East Lansing, Michigan Madison, Wisconsin Raleigh, N . C . Urbana, Illinois

EVlgRT WALLENIV'ELDT G . M . W A ~ C . A . ZI~TLE :Madison, Wisconsin Manhattan, Kansas Philadelphia, Pa.

C O M M I T T E E O N J O U R N A L M A N A G E M E N T

H. A. HEaMAN, C h a i r m a n 8 North Ninth St., Columbia, Me.

J . E. LEGATES F . J . DOAN, A d v i s o r E . O. HERREID, ex officio B. I t . WFmB

I t . F . JUDKINS, ex officio

O F F I C E R S O F T H E A S S O C I A T I O N

I . W. ]:~UPEL, P r e s i d e n t S . T . C o u L ~ a , V i c e - P r e s i d e n t Department of Dairy Science Department of Dairy Industries

Texas A & M College, College Station. Texas University of Minnesota, St. Paul, Minn.

H . F . JUDKINS, Sec. T r e a s . E . O . H m ~ a g m , E d i t o r - i n - C h i e f 32 Ridgeway Circle, White Plains, N . Y . Ohampai~'n, Ill.

D I R E C T O R S

~AYMON'D ALBRECTSEN E . L . JACK N . L . JAOOBSON F . E . N~LSON Ithaca, N.Y. Davis, Calif. Ames, Iowa Tucson, Arizona

C. W . NIBLER J . T . R ~ m W . M . ]~0BEI%TS Lincoln, Nebr. I thaca, N.Y. Raleigh, N. C.

E . 0 . HERREm, ex officlo I:[. F . JUDKINS, ex officio

A D M t N I S T R A T I V E I N F O R M A T I O N

General Advertising Garden, London, W.C. 2, England. Subscriptions for Aus- tralia should be sent to our agent: John It . Bryant,

Space 1 Time 6 Times 12 Times tte,.bel't Street, St. Leonards, N.S.W., Australia.

One Page $150.00 $132.00 $108.00 Changes of mailing addresses, post office notices of un- deliverable copies, inquiries about copies lost in the mail

Half Page 99.00 87.00 72.00 and all other matters pertaining to the mailing list for Quarter Page 52 20 46.20 39.00 nonmember subscribers should be sent to The Journal of

• Dairy Science in care of The Garra rd Press at the above Advertising plates, copy, insertion orders, contracts, adch'ess. 01aims for copies of the Journal of Dairy Sci-

ence lost in the m~dls must be received within 30 days and requests for information relating to advertising in (90 days foreign) of the date of issue. Notice of change tile Journal should be addressed to the Journal of Dairy Science in care of The Garrard Press, 510-524 North of address must be received two weeks before date of issue. Hickory Street, Champaign, Illinois.

M e m b e r s h i p s

Nonmember Subscriptions Membership dues in the Association are $12.50 a year Nonmember subscriptions are $20.00 per volume in and should be sent to H. F. Judkins, Secretary-Treasurer,

the United States and Canada; $20.50 in all other coun- 32 Ridgeway Circle, White Plains, New York. Renewal tries, net and postpaid. New subscriptions and renewals should be made not later than December 1 each year. begin with the first issue of the current volume. Renewals Changes of mailing addresses, inquiries about copies should be sent in by December 1 of the current year for lost in the mail, requests of back copies and all other the following calendar year to avoid a break in the series, matters pertaining to the mailing list for members of the Subscriptions shouhl be sent to Claude Cruse, The Garra rd American Dairy Science Association should be sent to Press, 510-524 North Hickory Street, Champaign, Illinois. Dr. Judkins at the above address. Claims for copies of

the Journal of Dairy Science lost in the mails must be Subscriptions for the British Isles and the British Em- received within 30 days (90 days foreign) of the date of

pire should be ordered through our agents: Messrs. Bail- issue. Notice of change of address must be received two liere, Tindan and Cox, 7 and 8 Henriet ta Street, Covent weeks before (late of issue.

Form 3579 to be returned to Garrard Press

Journal of Dairy Science is published monthly by the American Dairy Science Association and printed by The Garra rd Press, 510-524 North Hickory Street, Champaign, Illinois.

Second class postage paid at Champaign, Illinois.

Copyright, 1962, by the American Dairy Science Association. Printed in the U. S. A.