AUTHOR'S PREFACE. 



(to the ENGLISH EDITION.) 



In the hygienic movement of the times the control of 

 the production and handling of milk lias not been given 

 a prominent place. But the significance of this subject 

 is now plain and everywhere efforts are being made to 

 institute such a control or to improve it. The efforts of 

 cities to secure a wholesome supply of milk must of 

 course differ and be adapted to local conditions, but 

 they must all be governed by the same i)rinciples and 

 rest on exact knowledge of the composition of milk and 

 of the dangers that are to be avoided. 



In the preparation of this book it has been my hope 

 that it would not only be of use to my Danish col- 

 leagues, but that my colleagues in other countries would 

 find it to be of service to them. For this reason I pub- 

 lished a Danish and a (rerman edition simultaneously 

 and for the same reason I have been very glad to grant 

 Prof. Pearson's request for permission to prepare an 

 English edition. 



C. 0. Jexse^t. 



