A comprehensive scientific plate featuring three astronomical diagrams of solar eclipses occurring in 1750.

The top left diagram is titled "General diagram of the solar eclipse, year 1750, July 8th." It depicts the "Illuminated disk of the Earth" with the path of the moon's shadow ("Path of the center of the shadow") and the penumbra crossing the northern hemisphere. A small dark area labeled "Obscured particle of the Earth" represents the region of total eclipse.

To the right are two smaller diagrams: "Figure of the solar eclipse, year 1750, November 29th" showing the penumbra passing over the southern regions, and "Diagram of the solar eclipse, year 1750, December 28th" showing it passing over the northern regions. Both diagrams include lines for the "Ecliptic" and "Axis of the Earth."

Scales for "First minutes of degrees" and "First minutes of hours" are at the top, and a scale of "Individual first minutes of hours" is at the bottom.

At the bottom left, a large decorative scroll contains three columns of text with technical data and descriptions for each of the three eclipses.

General diagram of the solar eclipse, year 1750, July 8th

Universal meridian
Illuminated disk of the Earth
Obscured particle of the Earth
Path of the center of the shadow
Penumbra

Figure of the solar eclipse, year 1750, November 29th

Ecliptic.
Illuminated disk of the Earth
Path of the center of the shadow
Axis of the Earth
Universal meridian
Penumbra

Diagram of the solar eclipse, year 1750, December 28th

Illuminated disk of the Earth
Ecliptic.
Path of the center of the shadow
Axis of the Earth
Universal meridian
Penumbra
Individual first minutes of hours

SOLAR ECLIPSE

Year 1750, July 8th

Description

True time of conjunction of the month, 8th day, 10h 43' 11"
Longitude of Sun & Moon in the ecliptic, Cancer 15° 54' 47"
Place of Sun & Moon in aphelion.
Semidiameter of the Sun — 15' 52"
Semidiameter of the Moon — 15' 29"
Semidiameter of the penumbra — 31' 21"
Parallax of the Sun — 11"
Horizontal parallax of the Moon — 56' 46"
Semidiameter of the disk — 56' 35"
Angle of the Sun — 5° 43"
Moon's node towards — 6° 3"
Hourly movement of Moon from Sun — 31' 20"
Inclination of orbit of the Moon — 5° 7"
Beginning of all-way obscuration, afternoon — 8h 40'
Total of all-way obscuration, afternoon — 9h 23'
End of all-way obscuration, afternoon — 11h 30'
Duration of the same — 2h 58'
At the end of the southern part around the equator
there is good hope and in the regions of moderate
polar altitudes this eclipse will be seen,
thus the whole of Europe appears cast
outside the penumbra.

DEFECT OF THE SUN

Year 1750, November 29th

Description.

True time of conjunction of the month, 29th day, 0h 3' 51"
Longitude of Sun & Moon in the ecliptic, Sagittarius 6° 46' 17"
Place of Sun & Moon in apogee.
Semidiameter of the Sun — 16' 23"
Semidiameter of the Moon — 16' 30"
Semidiameter of the penumbra — 32' 53"
Parallax of the Sun — 11"
Horizontal parallax of the Moon — 60' 33"
Semidiameter of the disk — 60' 22"
Angle of the Sun — 5° 41"
Moon's node towards — 2° 35"
True hourly movement of Moon from Sun — 36' 10"
Inclination of orbit to the Ecliptic — 5° 13"
Beginning of all-way obscuration, before noon — 10h 4'
End of the same, afternoon — 2h 34'
Duration — 4h 30'
This whole defect ends in the southern ocean.
Near the arctic pole in regions
known to us, a small obscured
particle of the Sun will be seen.

ECLIPSE OF THE SUN

Year 1750, December 28th

Calculation.

True time, 28th day of Dec., month 3h 37' 53"
Longitude of Sun & Moon in the ecliptic, Capricorn 7° 3' 2"
Place of Sun & Moon towards perihelion.
Semidiameter of the Sun — 16' 23"
Semidiameter of the Moon — 15' 6"
Semidiameter of the penumbra — 31' 29"
Parallax of the Sun — 11"
Horizontal parallax of the Moon — 55' 23"
Semidiameter of the disk — 55' 12"
Angle of the Sun — 5° 33"
Moon's node towards — 1° 2"
Hourly movement of Moon from Sun — 27' 32"
Inclination of orbit to the ecliptic — 5° 5"
Beginning of all-way obscuration, afternoon — 1h 1'
End of the same, afternoon — 6h 13'
Duration — 5h 12'
Total all-way defect — 7h 39'
In North America and Greenland
a tiny particle of the Sun will be obscured.