Complex sentence: In 1850, on the occasion of the jubilee of obtaining his doctor's degree, appeared in five volumes his "Vermischte Schriften", consisting of a collection of minor works published between 1800 and 1844.
Split into simpler sentences: In 1850, on the occasion of the jubilee of his obtaining his doctor's degree, appeared in five volumes his "Vermischte Schriften". These consisted of a collection of his minor works published between 1800 and 1844.