...no use. •PROBLEM XLII. To make an erect dial, declining from the south toicards the east or west. Elevate the pole to the latitude of the place, and screw the quadrant of altitude to the zenith. Then, if your dial declines towards the east, (which we shall suppose in the present...

...of no use. PROBLEM XLII. To make an erect dial, declining from the south towards the east or west. Elevate the pole to the latitude of the place, and screw the quadrant of altitude to the zenith. Then, if your dial declines' towards the east, (which we shall suppose in the present...

...to find the hour of the night. RULE. Elevate the pole so many degrees above the horizon as are equal to the latitude of the place, and screw the quadrant of altitude upon the brass meridian over that latitude ; find the sun's place in the ecliptic, bring it to the...

...azimuth and the hour of the day.* Rule. Elevate the pole as many degrees above the horizon as are equal to the latitude of the place, and screw the quadrant of altitude on the brass meridian, over that latitude; bring the sun's place in the ecliptic to the brass meridian,...

...the place, as above, and screw the quadrant of altitude upon the brass meridian over the degree of latitude ; bring the middle of the analemma to the brass meridian, and set the index of the hour-circle to twelve ; turn the globe westward till the given day of the month, on the analemma, comes...

...quadrant of altitude on the Brass meridian over the degree of the sun's declination, bring the given place to the- brass meridian, and set the index of the hour circle {o 1 2; turn the globe eastward till the given place comes to the horizon, and the hours passed over...

...being given to find what Hour it is at any other place. Rule. Bring the place, where the hour is given, to the brass meridian, and set the index of the hour circle to that hour, then turn the globe till the proposed place comes under the meridian, and the index will...

...south pole, according as the latitude is north or south, the same number of degrees above the horizon ; bring the middle of the analemma to the brass meridian, and set the index of the hourcircle to twelve; turn the globe westward till the day of the month on the analemma come to the...

...of the river Don. [ PROBLEM XII. To find the Perueci of any given place. RULE. Bring the given place to the brass meridian, and set the index of the hour circle to 1 2, turn the globe half round, or till the index points to the other 12, then under the latitude of...

...twelve hours upon it. 33. To make a direct dial, declining from the south towards the east or west, elevate the pole to the latitude of the place, and screw the quadrant of altitude to the zenith. Then, if the dial decline towards the E. (which we shall suppose it does), count in...