[Rhinolithiasis--with special reference to minerology].

A rhinolith present for 77 years and weighing 18 g. is reported. Special emphasis is given to the problems of establishing the diagnosis of nasal calculi and foreign bodies. Furthermore, the study discusses the mineralogy of the rhinolith on the basis of the results yielded by the electron-ray micro-probe, x-ray diffractometry and infrared-spectroscopy with respect to the mineral Whitlockite.