Early marine chronometers and their makers - three

Early marine chronometers and their makers - three volumnes: Earnshaw, Thomas LONGITUDE. AN APPEAL TO THE PUBLIC: STATING MR. THOMAS EARNSHAW S CLAIM TO THE ORIGINAL IMPROVEMENTS IN HIS TIMEKEEPERS… British Horological Institute reprint of the original 1808 publication, Limited edition numbered 300/350, quarter bound with marbled boards; Mudge, Thomas A DESCRIPTION WITH PLATES OF THE TIMEKEEPER INVENTED BY THE LATE MR. MUDGE facsimile reprint of the 1799 edition, Turner and Devereux, London 1977, green cloth; and a copy of Betts, Jonathan (editor) PRINCIPLES AND EXPLANATIONS OF TIMEKEEPERS BY HARRISON, ARNOLD AND EARNSHAW British Horological reprint of various original publications dating from 1767 to 1806, 1984, half cloth marbled boards, (3).