Description | Responds to their letter of 30 August to note that the plate paper used by their lithographers is purchased by themselves, namely the Cambridge Scientific Instrument Company and Messrs West, Newman & Company, and Rix supposes that they would share information on where they obtain it. Rix also apologises for the delay in passing their proof, but explains that it is because the author of the paper, William de Wiveleslie Abney, is currently abroad. |