Another argument for the globular form of the Earth is the following:--The degrees of longitude radiating from the north pole gradually increase in extent as they approach the equator; beyond which they again converge towards the south. To this it is replied that no actual measurement of a degree of longitude has ever been made south of the equator! If it be said that mariners have sailed round the world in the southern region and have _computed_ the length of the degrees, it is again replied that such evidence is unfavourable to the doctrine of rotundity. It will be seen from the following table of what the degrees of longitude would be if the earth were a globe of 25,000 miles circumference, and comparing these with the results of practical navigation, that the diminution of degrees of longitude beyond the equator is purely imaginary. Latitudes at different longitudes:-- Latitude 1 = 59·99 nautical miles. 10 = 59·09 „ „ 20 = 56·38 „ „ 30 = 51·96 „ „ 34 = 49·74 (Cape Town) 40 = 45·96 „ „ 45 = 42·45 (Port Jackson, Sydney) 50 = 38·57 „ „ 56 = 33·55 (Cape Horn) 60 = 30·00 „ „ 65 = 25·36 „ „ 70 = 20·52 „ „ 75 = 15·53 „ „ 80 = 10·42 „ „ 85 = 5·53 „ „ 86 = 4·19 „ „ 87 = 3·14 „ „ 88 = 2·09 „ „ 89 = 1·05 „ „ 90 = 0·00 „ „