The most obvious method of realizing this direction is by the plumb-line.

Latitude thus determined by the plumb-line is termed astronomical.

Latitude thus determined by the plumb-line is termed astronomical.

It consisted of a graduated circle inside which another could slide, carrying two small tubes diametrically opposite, the instrument being kept vertical by a plumb-line.

ZENITH (from the Arabic), the point directly overhead; its direction is defined by that of the plumb-line.

In astronomy the horizon is that great circle of the sphere the plane of which is at right angles to the direction of the plumb line.

the deviation from the vertical, was regulated and measured by the introduction of a screw and a plumb-line.

One hypothesis was: while y Draconis was stationary, the plumb-line, from which the angular measurements were made, varied; this would follow if the axis of the earth varied.

Newton called attention to the fact that a falling body moves in a curve, diverging slightly from the plumb-line vertical.

It is considered to be an extinct volcano because it makes the plumb-line deviate only 7" to 8", from which it is deduced that the mountain is hollow.

Adjust the length of the plumb-line until it and the body oscillate together in unison.

Take for example the vertical line which is embodied in the direction of the plumb line.

Then the plumb line not only defines the zenith as already shown, but in a downward direction it defines the nadir, which is the point of the sphere directly below our feet.

As thus determined it is the angle between the direction of the plumb-line at the place and the plane of the equator.

It consisted of a graduated circle inside which another could slide, carrying two small tubes diametrically opposite, the instrument being kept vertical by a plumb-line.

ZENITH (from the Arabic), the point directly overhead; its direction is defined by that of the plumb-line.

In astronomy the horizon is that great circle of the sphere the plane of which is at right angles to the direction of the plumb line.

the deviation from the vertical, was regulated and measured by the introduction of a screw and a plumb-line.

One hypothesis was: while y Draconis was stationary, the plumb-line, from which the angular measurements were made, varied; this would follow if the axis of the earth varied.

Newton called attention to the fact that a falling body moves in a curve, diverging slightly from the plumb-line vertical.

It is considered to be an extinct volcano because it makes the plumb-line deviate only 7" to 8", from which it is deduced that the mountain is hollow.

Adjust the length of the plumb-line until it and the body oscillate together in unison.

The length of the plumb-line, measured from its point of suspension to the centre of the bob, is for all practical purposes equal to the length OC, C being therefore the centre of percussion corresponding to the selected axis 0.

Take for example the vertical line which is embodied in the direction of the plumb line.

Then the plumb line not only defines the zenith as already shown, but in a downward direction it defines the nadir, which is the point of the sphere directly below our feet.

The most obvious method of realizing this direction is by the plumb-line.

As thus determined it is the angle between the direction of the plumb-line at the place and the plane of the equator.

It differs from the astronomical latitude only in being corrected for local deviation of the plumb-line.

Using a carpenter's level, draw a plumb line that runs from the outside corners of your bathtub.

It differs from the astronomical latitude only in being corrected for local deviation of the plumb-line.