<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MS/257/3/338" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Letter from M Rikatcheff, Central Phys. Observatory, St Petersburg to Edward Sabine</dc:title>
  <dc:description>Refers to photographic instruments. Refers to being asked to take charge of meteorological observations and ‘make arrangements for the magnetical observations’. Discusses the variations of declination. Rikatcheff is currently adjusting the magnetometers of the photographic apparatus. Discusses the absolute determination of declination.</dc:description>
  <dc:date>18 February/1 March 1868</dc:date>
</rdf:Description>