Lectures de Potentia Restitutiva, or of Spring

Table V.^a The Hypothesis of Sir Christopher Wren, Knight

original: "D.ni Chr.i Wren Equ." - Dominus Christopher Wren Equitis. Wren was a founding member of the Royal Society and a polymath, famous today as an architect but equally significant in his time as an astronomer and mathematician.

February 31 25 20 15 10 5 January 1665 31 25 20 15 10 5 December 31 25 20 15 10 5 November

Figure 19

This geometrical diagram illustrates the projected path of a celestial body across a timeline, showing the intersection of various observational vectors.

January 1663
D
N
5 10 15 20 25 30
5 December

Figure 20

A large arc representing a portion of the zodiac, used to map the apparent position of a comet against the fixed stars.

♎ Libra ♏ Scorpio ♐ Sagittarius ♑ Capricorn
5 10 15 20 25
E
D
N

Figure 21

This diagram details the path of a celestial body relative to the Earth and the ecliptic plane, showing how the object moves from southern to northern latitudes.

November
5 10 15 20 25
Ecliptic plane The apparent path of the Sun's motion across the celestial sphere as seen from Earth.
South Latitude | North Latitude
5 10 15 20 25 30
December
31 January
Earth