A tutor to astronomie and geographie, or, An easie and speedy way to know the use of both the globes, coelestial and terrestrial in six books : the first teaching the rudiments of astronomy and geography, the 2. shewing by the globes the solution of astronomical & geographical probl., the 3. shewing by the globes the solution of problems in navigation, the 4. shewing by the globes the solution of astrological problemes, the 5. shewing by the globes the solution of gnomonical problemes, the 6. shewing by the globes the solution of of [sic] spherical triangles : more fully and amply then hath ever been set forth either by Gemma Frisius, Metius, Hues, Wright, Blaew, or any others that have taught the use of the globes : and that so plainly and methodically that the meanest capacity may at first reading apprehend it, and with a little practise grow expert in these divine sciences / by Joseph Moxon ; whereunto is added Antient poetical stories of the stars, shewing reasons why the several shapes and forms are pictured on the coelestial globe, collected from Dr. Hood ; as also a Discourse of the antiquity, progress and augmentation of astronomie.

PRAEFACE.

Some Advertisements in Choosing and Using the GLOBES.

1. SEE the Papers be well and neat∣ly pasted on the Globes: which you may know, if the Lines and Circles discribed thereon meet ex∣actly, and continue all the way even and whole: the lines not swerving out or in, and the Cir∣cles not breaking into several Ar∣ches; nor the Papers either come short, or lap over one the other.

2. See that the Culler be transparent, and ly not too thick on the Globe; lest it hide the superficial Descriptions.

3. See the Globe hang evenly between the Meridian and Horizon, not inclining more to one side then the other.

4. See the Globe swim as close to the Meridian and Ho∣rizon

as conveniently it may; lest you be too much puzzeld to find against what point of the Globe any degree of the Ho∣rizon or Meridian is.

5. See the Equinoctal line be one with the Horizon, when the Globe is set in a Parallel Sphear.

6. See the Equinoctal line cut the East and West point of the Horizon, when the Globe is set to an Oblique Sphear.

7. See the Degrees marked with 90. and 00, hang exa∣ctly over the Equinoctial line of the Globe.

8. See that exactly half the Meridian be above the Ho∣rizon, and half under the Horizon: which you may know if you bring any of the Decimal Divisions to the North Side of the Horizon, and find their Complement to 90. inth South.

9. See that when the Quadrant of Altitude is placed at the Zenith, the Beginning of the Graduations reach just to the superficies of the Horizon.

10. See that while the Index of the Hour Circle (by the motion of the Globe) passes from one hour to the other, 15. degrees of the Equator pass through the Meridian.

11. If you have a Circle of Position, see the Graduations agree with those of the Horizon.

12. See that your wooden Horizons be made substantial and strong; for (besides the Inconveniences that thin wood is subject unto, in respect of warping and shrinking) I have had few Globes come to mending that have not had either broken Horizons, or some other notorious fault, occasioned through the sleightness of the Horizons.

In the Using the Globes.

KEep the East side of the Horizon alwaies towards you, unless your Proposition requires the turning of it: which East side you may know by the Word East, placed on the outmost verge thereof. For then have you the gradu∣ated

side of the Meridian alwaies towards you; the Qua∣drant of altitude before you, and the Globe divided exactly into two equal parts.

So oft as I name to, at, of, or under the Meridian, or Horizon, I mean the East side of the Meridian, and Super∣ficies of the Horizon: because the East side of the Meridian passes through the North and South points, both of the Globe and Horizon; and agrees just with the middle of the Axis: And the Superficies of the Horizon divideth the Globe exa∣ctly into two equal parts.

It you happen to use the Globes on the South side the E∣quator, you must draw the wyers out of either Pole, and change them to the contrary Poles; putting the longest wy∣er into the South Pole. And because on the other side the Equator the South Pole is elevated, therefore you must ele∣vate the South Pole of the Globe above the Horizon; ac∣cording to the South Latitude of your Place; as shall be shewed hereafter.

In the working some Problems it will be required that you turn the Globe to look on the West side thereof: which turning will be apt to jog the Ball, so as the degree that was at the Horizon or Meridian, will be moved away, and there∣by the Position of the Globe altered. To avoid which incon∣venince you may make use of a Quill, thrusting the Feather end between the Ball and the Brazen Meridian, and so wedge it up, without wronging the Globe at all, till your Proposi∣tion be answered.