These are the principal Places of the known inhabited World. And becaufe the Distances of Places found by Spherical Trigonometry are the Arches of great Circles, and diverfe Nations uling diverfe Meafures to compute the fame; therefore I have fubjoined the following Table of different National Measures equal to one Degree, In the foregoing Tables, I find the City of Tornia in Lapland to have 66° 03' of Latitude, and Mittau in Courland in the Kingdom of Poland to have 57° oo' Latitude; but I find the Longitude of each Place is the fame, viz. 44° 00'; therefore I demand the Distance between those two Cities? From From the Latitude of Tornia Subftraft the Latitude of Mittau There remains the Difference That is, in Decimals 9.05 Degrees Multiply that by The Product is very nearly. 66 03 57 00 9 03 69.5 Miles in one Degree. 628.975, or 629 English Miles PROBLEM II. To find the Distance of two Places lying under the Equinoctial. Practice. This is the fame in Nature with the laft Problem; for as there the Difference of Latitude, fo here the Difference of Longitude reduced to Miles gives the Answer. PROBLEM III. Having the Difference of Longitude between any two Places on the fame Parallel of Latitude; to find the Distance and Bearing of each from the other. |