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Kuhn's Jellyfish

Kuhn's "example illustrates how the entrenched expectations of experimental outcomes and prescribed instrumental functions of an insider’s view of the laboratory and its equipment can pose a threat to new discoveries. The circumstances that enabled Roentgen (an insider) to first notice these new rays are not clear, but Kuhn proposes that the occurrence of anomaly enables discovery and that Roentgen’s ‘recognition that nature has somehow violated the paradigm-induced expectations that govern normal science’ (1970: 52–3) was important. Kuhn emphasises that Roentgen valued the anomaly instead of ignoring it – a vital step in the process of discovery" (Liebenberg 2021: 114).
End papers of 'What to Observe'

Published in 1841, Jackson’s guide was the first of a series of guides published during this period which offered notes for the traveller on appropriate conduct in the field – from providing methods for training the eye to observe what was deemed as relevant details, to instructions on which precision instruments should be carried and how to use them to record and inscribe the results of observations made (Withers 2013: 170). As Jackson states, his guide pointed out to the “uninitiated Traveller what he [sic] should observe, and to remind the one who is well informed, of many objects which (…) might escape him” (Jackson 1841: i).