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