Hi Louise, Yes, his contribution to mapping cannot be understated. Dava Sobel's Longitude is one of my favorite books! Best, Salim On 4/3/2018 8:25 AM, Ratliff, Louise wrote: > > Hello all, > > Today Google celebrates the birthday of John Harrison, an English > woodworker turned clockmaker, whose timepieces enabled sailors to > accurately calculate their longitude. Read on and learn about his > amazing innovations! > > Louise > > Louise Ratliff > > Social Sciences and Map Catalog Librarian > UCLA Library Cataloging & Metadata Center > BOX 957230, Life Science Bldg-Room 2400 > Los Angeles, CA 90095-7230 > > (310)206-5853 > -- G. Salim Mohammed, Head and Curator David Rumsey Map Center [log in to unmask] | 650.723.5100 library.stanford.edu/people/gsalim rumseymapcenter.stanford.edu David Rumsey Map Center Green Library Stanford University 557 Escondido Mall; MC 6004 Stanford, CA 94305-6004 "Live simply so others can simply live." -Gandhi.