Account of pendulum experiments undertaken in the Harton Colliery, for the purpose of determining the mean density of the earth, by G. B. Airy

View transcription
                                Then the observations were continued till the upper
observer was satisfied with the number, after which
he definitively broke the circuit; the lower observer
then broke circuit: and both prepared to observe
coincidences of the pendulums. On examining the interruptions of
signals, no difficulty was found in confronting the
corresponding observations. In one instance only
(between Swings 16 and 17) was the comparison
totally lost, in consequence of <s>the</s> one of the needles
sticking fast. The observation of
the time of the start of the needle is not very delicate:
and this part of the operation would be made much more
exact by causing each clock to register its own seconds
upon a common revolving barrel, in the manner of the
American transits.
26.<s>28.</s> The observations on each side which had no
corresponding observations on the other side being struck
out, the means of all the times of the remaining
observations in each group were taken, and the difference
of means was formed. As a check, the differences
of the times by the two clocks for each individual signal
                            
Please login to transcribe

Manuscript details

Author
George Biddell Airy
Reference
PT/54/5
Series
PT
Date
1855
IIIF
Open IIIF manifest
(What's this?)
This is a link to the IIIF web URL for this item. You can drag and drop the IIIF image link into other compatible viewers

Cite as

Account of pendulum experiments undertaken in the Harton Colliery, for the purpose of determining the mean density of the earth, by G. B. Airy, 1855. From The Royal Society, PT/54/5

Copy

Comments

Please login to comment