vi PREFACE 



In the Appendix the composition and preparation of 

 the various solutions is detailed. Tables are given to 

 facilitate the working out of results ; these Tables 

 are condensed to occupy one page each, and the saving 

 of time by avoiding the turning over of pages will more 

 than compensate for the slight extra labour due to the 

 condensation. 



While not intended to be a complete guide to the 

 analysis of milk, it is hoped that this work will afford 

 assistance to analysts, health officers, dairy students, 

 and those engaged in the supervision of dairies ; with 

 this object in view the more simple tests have been 

 described in a manner which will render their working by 

 persons other than chemists possible ; it must be remem- 

 bered, however, that though these methods are easy, they 

 are often fallaciously easy, and lack of chemical training 

 may lead to the making of errors, and the overlooking 

 of important points ; no amount of careful following of 

 directions can replace a thorough training in chemical 

 science and manipulation, and though simple tests have 

 a real value as a guide, they have not the reliability of 



an analysis made by a skilled chemist. 



H.D.R. 



September 1905 



