Meridians at equal Angles; these and other Properties it hath in common with the Globe. 2. From hence 'tis 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 fo much of Calculation as other Charts do. 3. Now because this Chart expreffeth the feveral Parts of the Superficies of the Earth in their due Pofition 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 conftructing this Globular Chart, it confifteth of thefe three Things: First, in drawing the Parallels; Secondly, in defcribing the Meridians; and Thirdly, in laying down the Rumbs in a due manner. The firft Part is performed with eafe, 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 defigned for the Chart, draw the Line AC, and graduate it into 90 Degrees, from a Scale of equal Parts; and on C as a Center, thro' every five or ten of thofe Degrees defcribe the Arches of Circles within the defigned Limits of the Chart; thofe Circular Arches will be thus equidiftant and concentric, and confequently they will be the Parallels of Latitude; which were to be drawn. 2. To defcribe the Meridians. In order to this, we muft know the Proportion of their Inclination to each other as they approach the Poles, Poles, and this being equal in equal Degrees of Latitude; all the Meridians that can fall within the Com pass of your Chart may be easily described by the following Table; which fheweth in what Proportion the Distance of Meridians diminish as they go from the Equator. Suppofe therefore two Meridians diftant 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 fet down. 1= Suppofe the Chart begins from the Equator (as that I have here fubjoined for Example doth ) Æ Q, and graduated from the fame Scale as the Meridian AC. Then take your Sector in hand, and with the Compaffes take AB 10° = A E, and fet it over parallel-wife 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 anfwering to the Latitude of 10°) and fet 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 fet it each way on the Parallel of 20 Degrees; then take 51° 56' and fet it off each way on the Parallel of 30 Degrees; on the Parallel of 40 Degrees fet 46° 00′ on each fide the graduated Meridian; and thus proceed by taking the tabular Number from the Sector, and fetting it on any other Parallel as far as the Chart requires, and thus fhall you have the Points in every Parallel of 10 Degrees, through which the feveral Meridians must pafs; you may do the like on the Parallel of every fifth Degree of Latitude; and haveing thus pointed the feveral Parallels on the Chart, you may with an even Hand, or a Bow for fuch Purpofes, defcribe Lines through thofe 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 thofe on the Globe it felf. 2. To defcribe the Rumbs. This may be done feveral 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 ftraight Lines, are very expeditiously drawn ; and that |