Later Life
Walker's natural history lectures spanned the academic year and were divided into two sections. The first half of the year he gave his 'Hippocratean' lectures, that is, meteorology, hydrology and geology. The second half of the year was devoted to the three kingdoms of nature: minerals, plants, and animals. During the 1760s, he had accepted Linnaeus' binomial classification system and during his university tenure he readily applied it to botany. However, he did not agree with Linnaeus' classification of minerals and animals and therefore he developed his own unique system for both of these subjects. Throughout his entire career he kept his ties with the Kirk and in 1790 he was elected to be Moderator, its highest position. Sometime in the late 1790s he began to lose his sight and several of his lectures were taken over by Dr Robert Jameson, a physician and former student who had also studied in mainland Europe. By the time that he died in 1803, Walker had taught well over eight hundred students, some of whom would go on to have a significant impact on nineteenth century natural history. Some of these names include Rev. Prof. John Playfair, Sir James Edward Smith, Sir James Hall, Mungo Park, Robert Waring Darwin, Robert Brown, Thomas Beddoes, Thomas Charles Hope, and Samuel Latham Mitchell.
Read more about this topic: John Walker (natural Historian)
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