The list of his published works includes over one hundred and 

 seventy numbers. These cover a wide range of subjects, most of them 

 related to agricultural and physiological chemistry. Professor Henue- 

 berg counted among his pupils many of the prominent agricultural 

 chemists in Europe. He was a member of not less than seventeen sci- 

 entific associations and societies in Germany and other countries. In 

 1889 the German Government conferred upon him the title of privy 

 councilor. 



The death of Professor Henneberg has been the occasion of several 

 reviews* of his life work and of the history and development of the sta- 

 tion where he labored so successfully for more than 30 years, and which 

 under his charge contributed so largely to the development of the 

 modern science of animal nutrition. Next to Liebig, Henneberg and 

 y. Wolft" rank as pioneer investigators of the nutrition of farm animals. 



The methods of analyzing feeding stufts, of testing their digestibility, 

 and of experimenting upon their nutritive values, the currently accepted 

 doctrines of animal nutrition, and the feeding standards which our sta- 

 tions follow in their work and in their teachings, are taken for the most 

 part from European" and especially from German sources. No station 

 lias done more to acquire accurate knowledge in these directions tlian 

 the one of which Professor Henneberg was director. Its history is of 

 interest, not only on this account, but as illustrative of the wisdom of 

 specialization, of the practical value of abstract research, and of the 

 time, labor, and expense that are necessary for obtaining the most 

 useful results. 



At the time of the establishment of the station the science of animal 

 nutrition was in the earlier and crutler phase of itsdeveloi)ment. Such 

 pioneer investigators as Lawesand Gilbert in England, Boussingault in 

 France, and, prei-minently, Liebig in Germany had laid out the line of 

 future i)rogress. Liebig had drawn the broad distinctions betwen the 

 nutritive ingredients of food and their functions, liischotf, Pettenkofer, 

 and Voit were elaborating the principles of nutrition of carnivorous ani- 

 mals. But the methods of analysis of foods and feeding stuffs were 

 still very incomplete. In estimating the nutritive value of feeding 

 stuffs, Thaer's theory of hay values, which rated given quantities by 

 ■weight, of the different kinds of fodder, as equal to 100 parts by weight 

 of hay, and P>oussingault's equivalents, which were based on the nitro- 

 gen content of feeding stufts, still ])revailed. By carefully conducted 

 feeding experiments, Henneberg pointed out the errors in Thaer's 

 method of estimating the value of feeding stufts and showed the theory 

 to be untenable. In its place he proposed a theory based on the chem- 

 ical composition of the materials. The fundamental importance of this 

 new doctrine is set forth by Prof. E. v. Wolft". 



"The year 18G0 is more especially to be regarded as the beginning of 

 a new period in the development of the science of animal nutrition, since 



•Jour. f. Laudw., :i8, No. 3 ; Landw. Vers. Stat., 39, p. 1. 



