Reference numberMS/119/2/30
TitleLetter from Charles James Buchanan Riddell, Woolwich to Humphrey Lloyd, Trinity College, Dublin
Date15 March 1842
DescriptionRiddell has recently heard from [Frederick Marow] Eardley-Wilmot, and he has bought '12 yoke of oxen' in anticipation of the survey. Riddell informs Lloyd that his supplemental observatory is very compact and will send a description to [William James] Smythe and [Charles] Younghusband.

Riddell has been working on a portable magnetometer, and has written a description of it along with instructions for adjustments. This is to be printed with Mr [Robert Were] Fox’s instructions for the use of his dip circle.

Discussion on the declination arc which is to begin at once along with additional observations. Riddell discusses [Edward] Sabine’s comments on the topic.
Physical descriptionInk on paper
Access statusOpen
Fellows associated with this archive
NA7327Riddell; Charles James Buchanan (1817 - 1903)1817 - 1903
NA8252Lloyd; Humphrey (1800 - 1881)1800 - 1881
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