Geography to Magellan

numerate navigators without science

three necessary mathematical inventions

a new way of thought

a political history of the longitude

the great pursuit of the longitude

astronomic navigation with sextant and chronometer

victoriana

self-containment

the homing quality of radio

the seeing quality of radio

radio, Apollonian, and Professor Doppler

the path of minimum time

a game of chance

on the price of annuities

past, present and future