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Encyclopedia > Polar area diagram

A polar area diagram is a type of chart first published in 1858 by Florence Nightingale, and thus also called a Nightingale rose diagram. It is similar to a pie chart, except that the slices are each of an equal angle, and differ rather in how far they extend from the centre of the circle. A chart is a graphic whore of some data. ... 1858 is a common year starting on Friday. ... Florence Nightingale, OM (12 May 1820–13 August 1910), who came to be known as The Lady with the Lamp, was the pioneer of modern nursing. ... A pie chart is a circular chart divided into segments, illustrating relative magnitudes or frequencies. ...


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INSTRUMENTS - Online Information article about INSTRUMENTS (6935 words)
(B) The polar axis is supported as in type A; the telescope is placed between the bearings of the declination axis and is mounted symmetrically with respect to the polar axis ; no counterpoise is therefore requisite.
(E) The eye-piece of the telescope is placed in the pivot of the polar axis; a portion or the whole of the axis of the telescope tube coincides with the polar axis.
The polar axis was similar in shape to that of fig.
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