Meridians at equal Angles ; these and other Properties it hath in common with the Globe. 2. From hence 'cis easy to conceive that any Diftance on any Part of this Chart is capable of being measured by a Scale of equal Parts, whether in a Great Circle, Rumb, or Parallel ; and therefore needs not so much of Calculation as other Charts do. 3. Now because this Chart expresseth the several Parts of the Superficies of the Earth in their due Position and Magnitude, therefore the Globular Projection is much more proper for Maps, as well as Sea Charts, than either the Stereographic, or Mercator's Projections. 4. As to the Method of making or constructing this Globular Chart; it consisteth of these three Things: First, in drawing the Parallels ; Secondly, in describing the Meridians; and Thirdly, in laying down the Rumbs in a due manner. The first part is performed with ease, but the two latter with more difficulty. The Manner of doing each is as follows. 1. To draw the Parallels. In the Middle of the Paper designed for the Chart, draw the Line AC, and graduate it into go Degrees, from a Scale of equal Parts ; and on C as a Center, thro' every five or ten of those Degrees describe the Arches of Circles within the designed Limits of the Chart ; those Circular Arches will be thus equidiftant and concentric, and consequently they will be the Parallels of Latitude ; which were to be drawn. 2. To describe the Meridians. In order to this, we must know the Proportion of their Inclination to each other as they approach the Poles, per Dil eing Poles, and this being equal in equal Degrees of Latitude ; all the Meridians that can fall within the Com. pafs of your Chart may be easily described by the following Table ; which sheweth in what Proportion the Distance of Meridians diminish as they go from the Equator. Suppose therefore two Meridians distant from each other in the Equator one Degree or sixty Italian Miles, then their Distance from each other in every Degree of Latitude is as here set down. of60 og 12056 241 140 16 co 160 30 08 10 24 159 56 121 56 00 411+5 1616129 04 819 20 259 54 2255 2642 +4 36162/28 081828 20 359 52123155 12 431+3 52 63/27 12831 7 20 4 59 502454 481 44 43 08 6426 16 1846 12 559 46 125/54 241 4542 241 6525 20 855 12 659 40 12654 00 46 41 40 166 24 24 86 4 12 7 59 37 27153 28 47 41 00 67123 28 87 3 12 8 59 24 2853 00 4840 08 68 22 32 88 2 4. 9159 102952 28 4939 20 169 21 32 189 1 4. 1059 0013051 56 50 38 32 70 20 32900 11158 52113151 241 151 37 4417119 32 1258 40 13250 52 15237 00 17218 32 1358 28 13350 20 153|36 08 173 17 32 1458 12 13449 44 54 35 26174/16 32 15158 00 13549 08] 155 34 24 17515 32 16157 40 136 48 321 56 33 32 17614 32 17157 20 37 47 56 157 32 49 177 13 32 18157 00 138 47 16 58 31 481 17812 32 19156 441 '39'46 36 159'31 ool 179'11 28 с The Use of this Table in describing the Meridians on this Chart is thus ; Suppose Suppose the Chart begins from the Equator ( as that I have here subjoined for Example doth ) Æ Q, and graduated from the fame Scale as the Meridian AC. Then take your Sector in hand, and with the Compasses take AB = 10o = A E, and set it over parallel-wise from 60 to 60 in your Sector ; the Sector remaining thus, take therefrom the Parallel Distance of 59° ( being in the Number in the Table answering to the Latitude of 100 ) and set it on the Parallel of 10 Degrees from E to a, b, c, each ways as far as the Limits of your Chart will admit ; then take the Parallel Distance of 56° 24', and set it each way on the Parallel of 20 Degrees ; then take 51° 56' and set it off each way on the Parallel of 30 Degrees ; on the Parallel of 40 Degrees set 460 00 on each side the graduated Meridian ; and thus proceed by taking the tabular Number from the Sečtor, and setting it on any other Parallel as far as the Chart requires, and thus shall you have the Points in every Parallel of 10 Degrees, through which the several Meridians must pass ; you may do the like on the Parallel of every fifth Degree of Latitude ; and haveing thus pointed the leveral Parallels on the Chart, you may with an even Hand, or a Bow for such Purposes, describe Lines through those Points, which when drawn, will appear to be Curvilineal, and equally inclining to each other, and are therefore the Meridians required to be drawn ; having the fame Properties with those on the Globe it self. 2. To describe the Rumbs. This may be done several ways ; but the best way is by a Projection of the Rumb, or Rumbs required on a Mecartor's Chart ; for they being there all straight Lines, are very expeditiously drawn ; and that |