257 



determining the Jiniount of fnsel oil in spirits. It was (onud to be pos- 

 sible witli tlie improved method to detect the presence of 0.01 per cent 

 of fnsel oil in spirits. 



The author refers to the practical tests at the Gottingen Station (see 

 p. 259) of the method of artificial digestion worked out under his direc- 

 tion, which throw new light on the determination of the digestibility of 

 protein by artificial means. 



Bremen; Prof. M. Fleischer, director. — In 1800. besides numerous 

 analyses of fertilizers and feeding stuifs, the work inclnded investiga- 

 tions of dijferent moor soils, field experiments on moors, and vegetation 

 experiments in pots, none of which are described. 



Breslau; (1) Experiment and Control Station; Prof. F. IToldefleiss, 

 director. — The analyses and examinations by this station included 

 3,854 samples of materials, among which were a large number of feed- 

 ing stuffs, food materials, fertilizing materials, substances used for 

 technical purposes, and soils. The feeding stuffs were as a rule not 

 only analyzed but also examined microscopically with reference to 

 purity and to condition (spoiled or not). Here, as at Posen (see below), 

 rye bran was found to be very extensively adulterated not only with 

 weeds, including some poisonous varieties, but also with all sorts of 

 spores from rusts and blights of the grain, in some cases to such an 

 extent as to render the bran unfit for food. Of the fertilizing mate- 

 rials bone meal and Thomas slag meal were more often found to be adul- 

 terated than any others. Ground bone was adulterated by replacing 

 the gelatinous materials which had been removed by steaming, not only 

 with Inn^n, hair, and the like, but also with castor pomace. 



Aside from the analytical work the following investigations have been 

 carried on during the year: (1) Studies of bone and bone meal with a 

 view to devising a means of judging of the various preparations of bone 

 which occur in the market. The results of this Avork have been pub- 

 lished by Dr. Holdefleiss in a pamphlet entitled Bas Knochenmehl, 

 seine Beurtlieilung und Verwendung; (2) field experiments with pota- 

 toes and with different varieties of grain in different i)arts of the Prov- 

 ince; (3) a critical study of the process employed by Chevalier Seeling 

 von Saulenfels for removing the bitter taste of lupine. 



(2) The Station for Agricultural Botany and Seed Control; Br. E. 

 Eidam, director. — During 1890 this station tested 1,905 samj)les of seeds 

 and made various botanical examinations. 



(3) Institute for Animal Chemistry; Prof H. Weislce, director. — This is 

 connected with the university at Breslau. In the exiierimental work 

 the director is assisted by Dr. S. Gabriel. The work of the year 

 included investigations in physiological chemistry and in animal 

 nutrition, esi^ecially with reference to the digestibility of feeding stuff's. 



Bahme; Prof B. Ulhricht, director. — Besides chemical analyses and 

 meteorological observations, the activity of this station has been along 

 the following lines: (1) Pot experiments on the relative agricultural 



