Copy letter from Arthur William Rucker, to F J S Hopwood, Board of Trade The Council decided to transmit the schedules to Hopwood, leaving it with the lawyers to make any necessary changes. There was a strong feeling about the use of the word 'weight' instead of 'mass'. These terms now have special meanings. 'Weight' is the force with which the earth attracts a body and it differs at different places as the force of gravity varies. Mass is a property of the body itself and it does not vary by place. Sorry to send such a rough copy but has no other. 18 March 1898