PREFACE. 



DURING the year 1871 I devoted much attention 

 to the subject of milk-analysis, and, besides 

 making many hundreds of analyses of milk 

 purchased in different parts of London for the 

 Milk Journal, was employed by Government 

 in an investigation into the milk supplied to 

 the Metropolitan Workhouses. I have likewise 

 examined the milk supplied to the Hospitals in 

 London. 



In the course of this work, I have been 

 fortunate enough to make some improvements 

 in the art of milk-analysis, and, in particular, 

 some little modifications in the taking of milk- 

 residues, so as to tranfer such determinations 

 (which before were tedious and uncertain) into 

 the list of the simplest and most exact of chemi- 

 cal analyses. At the present time, when a new 



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