| Description | [He has been working to get letters to admit him to China. Cumming will soon publish his Longitude principles of clock and watch work and will take some drawing machines for sale. 'I am turned Longitude mad'. Describes his sextant by Ramsden, and Dollond's improvements to his glasses — he has seen Jupiter's satellites. Attempt to correct the variation of the needle. Farewell; he will write from India]. |