For this week, forty-six manuscripts were added to the online repository, all on Monday. In a flashback to the pattern of a year ago, the largest section of the weeks manuscripts came from Reg.lat, with twenty-two. After that Ott.lat and Vat.lat each contributed eight, Barb.lat six, and Vat.ar three. The rest was split among Vat.turc and Ross with two each and Capp.sist with a single manuscript.
To the right is f.6r from Ott.lat.249, a manuscript about astronomy, specifically the course and motion of the planets. The page centers on a calendar, not too dissimilar from the liturgical calendar one might find in a Psalter or Missal, with a large KL at the top, a listing of saints and other feasts in the center, and date and computus information on the left. Starting from the Saints and moving left the first 2 columns are for the Roman system of dating, with the part (Nones, Idea, and Kalendads) and the count. This count is counting down to the next part, so if the Nones is the 7th, and the Ides the 15th, the 8th of the month is written "8 until the Ides". Unusually the count part of this date is written in arabic numerals, possibly to save space.
Continuing out from the center, the next column, letters a-g with 'a' in red, is dominical letters, part of the data used for calculating Easter. However the other data needed, the golden number, is missing, so this column is rather useless. Finally the date is represented in arabic numerals, counting simply from 1-31. This is unusual to find in liturgical calendars, but makes more sense paired with the other date.
On the other side of the dates are 4 pairs of columns in alternating red and black ink with astronomical data. Some of the columns are easy to understand, such as the Ortus Solis (rising of the sun) and Occasus Solis (sunset) on the far right, which give those times at a specific latitude. I am less sure about the meaning of the other two columns
The border at bottom is from f.2r of Capp.sist.27, another of the monumental 16th C service books in that collection.