A table of the equation of days, shewing how much a good pendulum watch ought to be faster or slower than a true sun-dial, every day of the year.

Author: Tompion, Thomas, 1639-1713.1683

A TABLE OF THE Equation of Days, SHEWING How much a good Pendulum Watch ought to be faster or slower than a true Sun-Dial, every Day in the Year.

Days.	Januar.			Februa.			March			April.			May.			June.			July.			Aug.			Sept.			Octob.			Nov.			Dec.
Days.	Mi.		Sec.	Mi.		Sec.	M.		Sec.	M.		Sec.	M.		Sec.	M.		Sec.	M.		Sec.	M.		Sec.	Mi.		Sec.	Mi.		Sec.	Mi.		Sec.	M.		Sec.
1	8	Watch too fast.	52	14	Watch too fast.	46	10	Watch too fast.	08	0	W. too f.*	46	4	Watch too slow.	12	1	W. too slow.*	02	4	Watch too fast.	52	4	Watch too fast.*	42	3	Watch too slow.	40	13	Watch too slow.	15	15	Watch too slow.	29	5	Watch too slow.*	53
2	9		14	14		45	9		51	0		30	4		14	0		49	4		59	4		32	4		00	13		28	15		21	5		25
3	9		36	14		43	9		34	0		14	4		14	0		36	5		06	4		21	4		21	13		42	15		12	4		57
4	9		58	14		40	9		17	0	*W. too slow.	01	4		14	0		24	5		13	4		11	4		42	13		55	15		02	4		27
5	10		19	14		36	9		00	0		17	4		14	0		12	5		20	4		00	5		03	14		08	14		51	3		57
6	10		38	14		32	8		42	0		32	4		13	0	*Watch too fast.	01	5		27	3		48	5		24	14		20	14		40	3		28
7	10		58	14		27	8		24	0		46	4		12	0		14	5		33	3		36	5		45	14		32	14		27	2		59
8	11		17	14		21	8		06	1		00	4		10	0		27	5		37	3		23	6		06	14		43	14		14	2		30
9	11		35	14		14	7		47	1		14	4		08	0		40	5		41	3		10	6		26	14		53	14		00	2		00
10	11		52	14		07	7		28	1		28	4		05	0		53	5		44	2		56	6		47	15		03	13		46	1		29
11	12		09	14		00	7		09	1		40	4		02	1		07	5		48	2		42	7		08	15		12	13		30	0		59
12	12		26	13		52	6		50	1		52	3		58	1		20	5		51	2		27	7		28	15		21	13		13	0		28
13	12		40	13		43	6		32	2		04	3		54	1		33	5		54	2		12	7		49	15		29	12		56	0	*Watch too fast.	02
14	12		53	13		33	6		13	2		16	3		48	1		46	5		55	1		56	8		09	15		36	12		38	0		32
15	13		06	13		23	5		54	2		27	3		43	1		58	5		56	1		40	8		29	15		42	12		18	1		02
16	13		18	13		12	5		36	2		37	3		37	2		11	5		56	1		23	8		49	15		48	11		59	1		32
17	13		30	13		01	5		17	2		47	3		30	2		23	5		56	1		07	9		09	15		53	11		39	2		01
18	13		42	12		49	4		58	2		57	3		23	2		36	5		55	0		50	9		29	15		57	11		18	2		31
19	13		51	12		36	4		38	3		06	3		15	2		49	5		54	0		33	9		49	16		00	10		56	3		00
20	13		59	12		23	4		19	3		15	3		07	3		01	5		52	0		15	10		08	16		02	10		34	3		29
21	14		08	12		10	4		01	3		23	2		59	3		12	5		50	0	*Watch too slow.	03	10		26	16		04	10		11	3		57
22	14		16	11		56	3		42	3		30	2		51	3		23	5		47	0		22	10		44	16		05	9		48	4		25
23	14		23	11		42	3		23	3		37	2		43	3		34	5		43	0		41	11		02	16		05	9		24	4		53
24	14		29	11		28	3		05	3		43	2		33	3		45	5		39	1		00	11		20	16		05	8		59	5		20
25	14		33	11		13	2		46	3		49	2		22	3		55	5		34	1		19	11		37	16		04	8		34	5		48
26	14		37	10		57	2		28	3		54	2		10	4		06	5		28	1		38	11		54	16		01	8		08	6		15
27	14		41	10		41	2		11	3		58	1		58	4		16	5		22	1		58	12		11	15		58	7		42	6		41
28	14		44	10		25	1		53	4		02	1		46	4		25	5		15	2		18	12		28	15		54	7		14	7		07
29	14		45				1		36	4		06	1		34	4		34	5		07	2		39	12		44	15		49	6		47	7		33
30	14		46				1		19	4		08	1		24	4		43	4		59	2		59	13		00	15		43	6		20	7		58
31	14		46				1		02				1		13				4		51	3		19				15		36				8		22

SET the Watch so much faster or slower than the time by the Sun, according to the Table for the Day of the Month, when you set it; and if the Watch go true, the difference of it from the Sun any Day afterward will be the same with the Table.

LONDON, Printed for Tho. Tompion, Clockmaker, at the Three Crowns in Fleet-street, at Water-lane end. 1683.

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