1,721,022 research outputs found
A new & correct sea chart of the whole world [cartographic material] shewing the variations of the compass as they were found Año 1700 with a view of the generall and coasting trade winds and monsoons or shifting trade-winds /
No full textWorld map showing wind directions and degrees of variations.; In upper left corner: Vol.1. Plate 2 pag. 61.; From: Miscellanea curiosa : being a collection of some of the principle phaenomena in nature accounted for by the greatest philosophers of this age / Edmond Halley. London : J. Wale, 1705-1707.; Prime meridian: London.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.map-rm3830. Inset: A map of North Pole.New and correct sea chart of the whole worl
A chart of Borneo, Java and the Philippine Islands [cartographic material].
No full textEngraved chart with rhumb lines and wind roses which also shows part of New Guinea and Northern Australia.; Plate 36 from: Atlas maritimus et commercialis /Edmund Halley. 1728.; NMM, v. 3, no. 341.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-t135
Stellarum fixarum hemisphærium boreale [cartographic material] : the northern hemisphere projected on the plane of the æquator in which all the stars contain'd in the Britannick catalogue (as publish'd by D' Halley) are carefully laid down and adapted to the beginning of the year 1690 the afterismes being drawn to answer the description of the ancients.
No full textA first issue of the engraved astronomical northern hemisphere star maps by Senex. The product of an uneasy alliance between Halley and Flamsteed and the most widely used of all contemporary star maps. The map includes their most recent discoveries including showing novas and nebulas derived from Halley's work in Philosophical transactions as well as the seventh-magnitude telesopic stars that had been observed by Flamsteed.; Includes 9 small spheres and numbered notes with problems and solutions in the left and right panels.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.map-rm4129
Stellarum fixarum hemisphærium australe [cartographic material] : the southern hemisphere projected on the plane of the æquator in which all the stars in the Britannick catalogue and those observ'd by Dr. Edm. Halley at the Isl. of St. Helena, are carefully layd down for the year 1690 by Joseph Harris.
No full textA first issue of the engraved astronomical southern hemisphere star maps by Senex. The product of an uneasy alliance between Halley and Flamsteed and the most widely used of all contemporary star maps. The map includes their most recent discoveries including showing novas and nebulas derived from Halley's work in Philosophical transactions as well as the seventh-magnitude telesopic stars that had been observed by Flamsteed.; In lower margin: Engrav'd and sold by I. Senex at the Globe, over against St. Dunstans Church in Fleetstreet. Where may be had the Zodiac, containing all the stars hitherto oberved, to which the Moon or planets can at any time apply: very usefull in astronomical observations, particularly in finding the longitude at sea. Also the solar system describing the paths of the planets and comets from Sr. I. Newton by Wil. Whiston M.A.; Includes 2 spheres and numbered notes with problems and solutions in the left and right panels.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.map-rm4130.Hemisphærium austral
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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