<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/CD/92/14" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Copy letter from Walter Preston, 8 Great George Street, Westminster, to Oliver R. H. Bury, 43 Threadneedle Street </dc:title>
  <dc:description>The Manager's Coach on the Peruvian Railway has an ampere capacity of 10-15 working at 12-24 volts. The battery has a capacity of 490 ampere hours. If the x-ray azpparatus consumes 15 amperes it should give 30 hours stoarge. It this is not enough for the scientific expedition a portable lighting set could be purchased for £150 and installed on the train.  </dc:description>
  <dc:date>16 June 1921</dc:date>
</rdf:Description>