PREFACE 



IT is to be hoped that the present volume 

 has unique merits of its own, and will appeal 

 not only to manure manufacturers but to 

 farmers, as well as to agricultural students and 

 all those who take an intelligent interest in the 

 subject of agricultural chemistry. Common 

 sense dictates that it is equally important for 

 the student of agriculture to be ab'e, if need 

 be, to effect the synthesis of a manure as to be 

 able to carry out the analysis thereof. The student 

 who can construct, mentally, a formula for a 

 manure to yield, whether by dry mixing or wet 

 mixing, certain predetermined results on analysis, 

 is more highly trained than he who can use 

 the faculties of destruction to resolve a manure 

 into its constituent e'ements by following a 

 treatise on agricultural chemical analysis, and 

 that too often by methods which he would have 

 to unlearn if he entered a fertilizer factory, 

 where he would have to analyze manures and raw 

 materials against chemists of some reputation. 



STRAUSS L. LLOYD. 



INVERNESS, FLORIDA, 

 July 15, 1918. 



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