South-west of these buildings, on the other side of the Johannisthal Park, are clustered the medical institutes and hospitals of the university - the infirmary, clinical and other hospitals, the physico-chemical institute, pathological institute, physiological institute, ophthalmic hospital, pharmacological institute, the schools of anatomy, the chemical laboratory, the zoological institute, the physicomineralogical institute, the botanical garden and also the veterinary schools, deaf and dumb asylum, agricultural college and astronomical observatory.
The study of pharmacological actions was at first almost entirely confined to those of remedial agents, and especially to the remedies in the different national pharmacopoeias, but in many cases it has now been extended to substances which are not used for curative purposes.
Between this and 1880 a museum, a school of agriculture, and a culture garden were added, and since then library, botanical, chemical, and pharmacological laboratories, and a herbarium have been established.
Their pharmacological action is as obscure as their effects in certain diseased conditions are consistently brilliant and unexampled.
Although a nitrate, its pharmacological actions resemble those of nitrites such as amyl nitrite, taken internally.