| RefNo | CLP/20/3/2 |
| Level | Item |
| Title | Diagram, Nested glass bulbs by Robert Hooke |
| Date | 26 November 1662 |
| Description | Diagram showing section of a glass bulb fitted inside a larger glass bulb with water added between the two bulbs, illustrating 'A conjecture at the causes' of the inner bulb breaking. This was reported among other experiments using glass balls to the meeting of the Royal Society on 26 November 1662.
ABC shows a glass ball made of white glass melted in the flame of a lamp and sealed up while the ball was very hot. DFEIK indicates a bolt head cut off at IK to fit in the ball and sealed up with cement afterwards. Water is then poured in between the bolt head and the glass ball until it reaches H. When the top of the glass ball A is broken, the height of the water rises to G (1/8 of an inch), which indicates the measure of the air that was compressed in the glass ball ABC.
Subject: Physics, Natural Philosophy |
| Extent | 4p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |
| RelatedRecord | CLP/20/3 |
| CLP/20/3/1 |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8242 | Hooke; Robert (1635 - 1703); natural philosopher | 1635 - 1703 |