[Just Published] 



The Determination of 

 Hydrogen Ions 



by 



W. Mansfield Clark, Ph.D. 



This treatise on the hydrogen electrode, indicator, and supplementary 

 methods of determining hydrogen ion concentrations, with an indexed bib- 

 liography of eleven hundred references on applications, is an important con- 

 tribution to the literature in this field. 



Are You Interested in 



analytical methods, in the acidity of your garden soil, in enzymes, in blood 

 and the determination of acidosis, in modern methods of handling protein 

 solutions, in the cultivation and study of bacteria, yeasts, molds and tissue, 

 in autolysis, hydrogen ion catalyses, colloids, the digestive system, filtration, 

 plant distribution, natural waters, the hydrogen ion concentration of biolog- 

 ical fluids? 



If so, you will need the methods and the references found in 



The Determination of Hydrogen Ions 



Limited Edition [318 pages] 



YOUR EARLY ORDER IS SUGGESTED 

 May be ordered from 



WILLIAMS & WILKINS COMPANY, Publishers 



Williams and Wilkins Company, 

 Mount Royal and Guilford Avenues, 

 Baltimore, U. S. A. 



Please enter an order for copy(s) of The Determination of Hydrogen Ions by W. Mansfield 



Clark, Ph.D. Remittance for $5.00, United States, Mexico, Cuba; $5.25, Canada: $5.50, other countries, is 

 enclosed to cover, (or) Remittance will be made on receipt of your statement, (or) Remittance will be made 

 about 1920. 



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