Many of the doctrines discussed in the course of his lectures were converted by his pupils into subjects of academical dissertations. These were published by him, under the name of Amaenitates Academicae,--a collection which comprises many admirable essays in natural history, medicine, domestic and rural economy. The first volume appeared in 1749, the seventh and last in 1769. An edition in ten volumes, containing also the later essays of Linnaeus himself, was published by Schreber in 1785-91. Selections from the Amaenitates have also been printed in English and German. It has been judged necessary to give at least the titles of the numerous works of Linnaeus, because the list may be useful to those desirous of examining them generally, or of referring to a particular treatise. The influence which they exercised upon the advancement of science, and especially upon that of botany and zoology, we shall have occasion to notice in the second volume of the present work. SECTION XIII. _A brief Notice of Linnaeus's Son._ Unnatural Conduct of the Mother of the Younger Linnaeus--His Birth and Education--In his eighteenth Year he is appointed Demonstrator of Botany, and, three Years after, Conjunct Professor of Natural History--He visits England, France, Holland, Germany, and Denmark--On returning engages in the Discharge of his Duties; but at Stockholm is seized with Fever, which ends in Apoplexy, by which he is carried off--His Character and Funeral. Although the younger Linnaeus has been considered as a botanist rather than a zoologist, a brief notice of him may be suitably appended to the biography of his father, more especially as he can scarcely be said to have possessed an independent existence, either as a man or as a naturalist. The victim of domestic tyranny, he seems to have lost whatever energy he might originally have possessed, and to have passed through life without being influenced by those powerful motives which usually impel ambitious men in their career. His mother, who in her conduct towards him bore some resemblance to the infamous mother of Savage the poet, entirely broke his spirit, which perhaps was never of the most ardent or aspiring description. Not content with making his home as uncomfortable as she could, she conceived a positive hatred for her only son, which she displayed by every affront and persecution that her situation gave her the means of inflicting on his susceptible and naturally amiable mind.[L]