Natural history is unorthodox territory for the historian of science. It is an area of study in which elaborate theories and intricate experiments play comparatively little part: the science we are concerned with is not on the whole a matter of cumulative hypothesising and culminating breakthroughs. He who would regard these as the sole topics deserving of his craft had best leave our subject well alone. For he will only deceive himself, and irritate us, if in unravelling its intellectual twists and turns he concludes that by so doing he has adequately encompassed its past and accounted for all that is significant among its activities and accomplishments. Natural history is different. It is, for a start, primarily observational and descriptive; experiment and theory underpin it, but are not the mainspring of its existence. It is concerned first and foremost with nature's surface — with charting its distinguishing features in all their subtlety and minuteness and with comprehending the patterns of their grouping and spatial occurrence. As such it is a field of exceptional appeal to the layman and at the same time, despite increasing sophistication in techniques and the growing impingement of incomparably more esoteric areas of knowledge, still quite exceptional in its accessibility. The fact that it is so accessible has a profound effect on its make-up. Because of the very vastness of the lay following that has built up through the years and because in general this has lacked, and continues to lack, any thorough grounding in scientific concepts and methods, it is not the values and concerns of the wider world of science that tend to predominate. Unusually for a scholarly pursuit — but like that other great layman's field, archaeology — it is not among the professionals that the centre of gravity is located. There are two subsidiary influences at work among the professionals themselves that serve to reinforce this. First, most of them who choose this field have been drawn to it through an amateur interest in natural history initially, and as often as not this leaves behind a tacit feeling of affinity which inhibits the development of an isolating professionalism. Secondly, thanks to the accident that for a full hundred years now biological work that is field-oriented has never been in the disciplinary mainstream, indeed in the eyes of the scientific world as a whole has seldom been more than peripheral, taxonomists and field scientists generally have tended to compensate for this neglect by relishing the esteem of non-professionals. As a result, compared with almost all other studies, in natural history the intellectual -cum-social segregation between the professional and the amateur has had little chance of developing. Undiscouraged from comparing themselves with professionals, numerous amateurs have continued to find it worthwhile to aim at exacting standards; and professionals, finding the contributions of amateurs acceptable, have in turn been more than willing to share their knowledge and speak and write to them as equals.
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