![](https://coimages.sciencemuseumgroup.org.uk/315/730/large_thumbnail_smg00045432.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/315/730/large_thumbnail_smg00045432.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/319/306/large_thumbnail_smg00048001.jpg)
Scioptric brass ball
![](https://coimages.sciencemuseumgroup.org.uk/310/527/large_thumbnail_smg00052752.jpg)
"Guttman" ball
![](https://coimages.sciencemuseumgroup.org.uk/310/524/large_thumbnail_smg00052748.jpg)
"Guttman" ball
![](https://coimages.sciencemuseumgroup.org.uk/310/528/large_thumbnail_smg00052753.jpg)
"Guttman" ball
![](https://coimages.sciencemuseumgroup.org.uk/316/963/large_thumbnail_smg00045380.jpg)
Six ivory balls
1750
![](https://coimages.sciencemuseumgroup.org.uk/437/645/large_thumbnail_smg00153675.jpg)
Superball made of synthetic rubber
1965
![](https://coimages.sciencemuseumgroup.org.uk/432/676/large_thumbnail_smg00153913.jpg)
3 rubber balls
![](https://coimages.sciencemuseumgroup.org.uk/429/332/large_thumbnail_smg00101852.jpg)
White early plastic ball
![](https://coimages.sciencemuseumgroup.org.uk/436/564/large_thumbnail_smg00081934.jpg)
One ivory ball turned inside solid
1843-1884
![](https://coimages.sciencemuseumgroup.org.uk/319/323/large_thumbnail_smg00048018.jpg)
Scioptic ball
1780-1840
![](https://coimages.sciencemuseumgroup.org.uk/436/487/large_thumbnail_smg00081844.jpg)
Ball of wood carved on a small
1890-1913
![](https://coimages.sciencemuseumgroup.org.uk/33/527/large_thumbnail_b900678.jpg)