![](https://coimages.sciencemuseumgroup.org.uk/20/125/large_thumbnail_1943_0184.jpg)
Sky Sketches, illustrating optical phenomena
- artist:
- William Ascroft
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/67/559/small_thumbnail_1888_0156_0002_0007__0001_.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/41/530/small_thumbnail_1888_0156_0002_0008.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/41/529/small_thumbnail_1888_0156_0002_0007.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/41/531/small_thumbnail_1888_0156_0002_0009.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/41/524/small_thumbnail_1888_0156_0002_0001.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/41/526/small_thumbnail_1888_0156_0002_0004.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/41/527/small_thumbnail_1888_0156_0002_0005.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/41/525/small_thumbnail_1888_0156_0002_0003.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/41/528/small_thumbnail_1888_0156_0002_0006.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/19/542/small_thumbnail_1888_0156_0002__0002_.jpg)
![Sky Sketches, illustrating optical phenomena](https://coimages.sciencemuseumgroup.org.uk/19/541/small_thumbnail_1888_0156_0002__0001_.jpg)
One board with nine mounted sketches, including three entitled 'Afterglow', dated November 9, three entitled 'Afterglow at No. 2', dated November 27, and three sketches entitled 'Afterglow with rays', dated November 28, by William Ascroft, London, England, 1883