| RefNo | CLP/3ii/20 | 
| Level | Item | 
| Title | Paper, 'A contrivance to avoid irregularities in a clock's motion occasioned by the action of heat and cold upon the pendulum' by George Graham | 
| Date | 1726 | 
| Description | Graham, a watchmaker, shares observations on the curiosities in the measuring of time. He notes that the vibrations of a pendulum are slower in summer than in winter, and suggests that this arises from a change of length in the pendulum itself, by the influences of heat and cold upon it, in the different seasons of the year.
  Subject: Physics / Engineering
  Published in Philosophical Transactions as 'A contrivance to avoid the irregularities in a clocks motion, occasion'd by the action of heat and cold upon the rod of the pendulum'
  Read to the Royal Society on 28 April 1726 | 
| Language | English | 
| Extent | 5p | 
| Format | Manuscript | 
| PhysicalDescription | Ink on paper | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| RelatedMaterial | DOI: 10.1098/rstl.1726.0006 | 
| RelatedRecord | RBO/12/32 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA8405 | Graham; George (1673 - 1751) | 1673 - 1751 |