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PLEASURES OF THE TELESCOPE.
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We shall only see it as a hazy speck. No. 4415 is another nebula worth glancing at. It is Tuttle's so-called variable nebula.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/35/PSM_V47_D217_Wonders_of_the_night_sky_map_16.jpg/500px-PSM_V47_D217_Wonders_of_the_night_sky_map_16.jpg)
Map No. 16.
There are three constellations represented on map No. 16 to which we shall pay brief visits. First Aquila demands attention. Its doubles may be summarized as follows: 11, magnitudes five and nine, distance 17·4″, p. 252°; π, magnitudes six and seven, dis-