Agricultural education is making such rapid strides in this country,
that no apology is needed for translating a book which appears to fill a
gap, especially as it is written by a well-known authority. Dr. Ritzema
Bos has kindly allowed certain small alterations to be made which adapt
the work to the requirements of British agriculture. Additions are
indicated by square brackets, and small print employed in the case of
some non-British animals. A few forms have been omitted for similar
reasons. Constant reference has been made to the published works of Miss
E. A. Ormerod, who has added to my obligation by writing an
Introduction, and I also wish to acknowledge my indebtedness to Mr. J.
H. Salter, B.Sc., and Mr. J. Dawson Roberts, M.R.C.V.S., for kind help
given by them.