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under the control of the station, and 1,600 analyses of these articles 
and of food-materials were made during the year. 
Work planned for 1875.—The experiments 1-5, above, to be continued. 
1. Investigations on the periodic increase in dry substance, &c., in 
the growth of the maize-plant. (Undertaken at the instance of the 
ministry of agriculture.) 
2. Investigations on moor-culture in Holland. 
3. On the alteration of the organized substance of nitrogenous fertil- 
izers by fermentation. 
WEENDE.—1. Rotten brood of bees, (analyses of materials collected 
in 1873.) 
2. Developments of sugar-beets, (analyses of materials collected the 
previous year.) 
3. Preparation of charts illustrating the more important experiments 
made at Weende, on the transformation of nutritive material by neat 
cattle and sheep. Besides this, analyses were made for private individ- 
uals of 64 samples of commercial fertilizers, 4 marls, 4 moor-soils, 1 cul- 
tivated soil, 5 waters, and 7 fodder-materials. 
Work planned for 1875.—1. Experiments on the fattening of sheep of 
different breeds. 
2. Testing the Pettenkofer respiration apparatus. 
3. Investigations with sheep on the dependence of the digestion of 
food upon the proportion, by weight, of coarse fodder on the one hand, 
and of grains and roots on the other. 
4, Experiments on the preservation of milk by use of salicylic acid. 
Bonn.—A considerable number of analyses were made by fertilizers, 
seeds, and fodder-materials. 
Work planned for 1875.—1. Investigations on the influence of salicy- 
lic acid upon the preservation of animal products. 
2. Investigations on the composition and value of various materials 
for tanning. 
3. Investigations of marls occurring in the Rhine region. 
MUtnstTER.—1. On the liberation of free nitrogen in the decay of nitro- 
genous organic substances. 
2. On the constitution of vegetable fats. 
3. On the digestibility of wax. 
4. On the chemical composition of human foods. 
Analyses were made of 340 samples of fertilizers, 14 marls, 21 fodder- 
materials, 21 potable waters, 19 technical materials, and 179 samples of 
seeds. 
Work planned for 1875.—Besides repetition, in fuller detail, of the 
work of 1874: 
1. (At the instance of the Prussian ministry of agriculture.) Deter- 
mination of the increase of dry weight of potatoes and corn in different 
stages of growth. 
2. Determination of the amounts of the individual mineral ingredients 
which a water used repeatedly for irrigation will yield to the soil. 
DAHME.—1. Chemical and microscopical investigations on the con-, 
sumption and storage of reserve-materials in the potato-tuber. 
2. Comparative experiments, in pots and in the field, on the effect of 
potash in natural kainit and in the manufactured potash salts. 
3. Field-experiments with artificial waters. 
4, Experiments upon the influence of different ways of cutting seed- 
potatoes upon the yield. 
5. Experiments on the growth of oats and peas in the shade. 
