On Agriculture (De Re Rustica) (1514) - Page 13

...they are better recognized when the increases or decreases of the days are paired with the decreases or increases of the shadows. Once this matter is known, that different reason will also be understood why, in the span of the hours, January is joined to December, February to November, March to October, April to September, May to August, and June to July, by a similar line, as Palladius says, they increase or decrease.

In January, days increase and shadows decrease.		In July, days decrease and shadows increase.
hour 1	29 feet	hour 1	22 feet
hour 2	19 feet	hour 2	12 feet
hour 3	15 feet	hour 3	8 feet
hour 4	12 feet	hour 4	5 feet
hour 5	10 feet	hour 5	3 feet
¶ hour 6	9 feet	¶ hour 6	2 feet
hour 7	10 feet	hour 7	3 feet
hour 8	12 feet	hour 8	5 feet
hour 9	15 feet	hour 9	8 feet
hour 10	19 feet	hour 10	12 feet
hour 11	29 feet	hour 11	22 feet

In February, days increase and shadows decrease.		In August, days decrease and shadows increase.
hour 1	27 feet	hour 1	23 feet
hour 2	17 feet	hour 2	13 feet
hour 3	13 feet	hour 3	9 feet
hour 4	10 feet	hour 4	6 feet
hour 5	8 feet	hour 5	4 feet
¶ hour 6	7 feet	¶ hour 6	3 feet
hour 7	8 feet	hour 7	4 feet
hour 8	10 feet	hour 8	6 feet
hour 9	13 feet	hour 9	9 feet
hour 10	17 feet	hour 10	13 feet
hour 11	27 feet	hour 11	23 feet