Transcriber's notes:Obvious typos and inconsistencies corrected/standardised:BruxelletoBruxelles,Nitrid AcidtoNitric Acid,i.e.toi. e.,Société des aqua-fortistestoSociété des Aqua-fortistes(as elsewhere in text),EpreuvestoÉpreuves(as elsewhere in text),cardboardtocard-board,overbittenandover bittentoover-bitten,travelling boardtotravelling-board(as elsewhere in text).Other inconsistencies generally left as in original:Zinc/zincvZink/zink,facsimilevfac-simile,nowadaysvnow-a-days,India-rubbervindia-rubber,Rembrandt van RhynvRembrandt van Rijn.Table of Contents: expanded (compared to original book) by including all sections in the List of Works. Note that the section headedMy Dear M. Lalannein the text is calledLetter by M. Charles Leblancin the Table of Contents.Plate IX and page xxiv: the writing on the plate is not very clear, but the building is actually called the Waag, this has been used in the text.