| Description | Harrison has discovered that, with only two exceptions, the illustrations referred to in their letter were reproduced by collotype process, so no blocks are available. Text figure 12 from a paper by Ewing and Rosenhain from Philosophical Transactions of the Royal Society A 193, and plate 2, figure 1 from Humfrey's paper from Philosophical Transactions A 200. They do not loan original blocks, but he can instruct their printers to prepare electros of the two blocks, and send them on with a invoice, which should be for a very small charge. |