DPW-11

Time Finding

Quadrant

Quadrant: Horary

Volparia, Girolamo della

Recto--Italian hours drawn as 2 sets of lines. Continuous lines for morning hours (9-19) and dotted for afternoon (17-24). Arabic numerals. Abbreviated Latin names of months June to December on left edge and December to June on right edge. Months divided into 10 day intervals. Limb divided 0-90 degrees every one degree. Original plumb-line missing. Shadow square of 12 parts in vertex. Solar motion table inscribed as 3 concentric rings: Initials of zodiacal signs; initials of months; scale [January] 7-8-6-5-5-4-4-4-3-4-5 [December]; "X III." Verso--same as recto, except instructions within ribbon. Additional pair of sights with line of stars between them. A very similar quadrant is in the Museo di Storia della Scienza in Florence. The same solar motion table appears on a pin-gnomon dial of Laurentius Vulpaia, 1560 (DPW-14) in the Adler Planetarium's collection.

"HIERONIMVS VVLPARIA FLORENTINVS. FACIEBAT A. D. MD. L. XXIIII"

Noon marked "MERIDIES."

Shadow square marked "VMBRA RECTA VMBRA VERSA."

Solar motion table labeled "TAB SOL MOT."

Maker's inscription on a rippling ribbon

Between sights, "MELIO. MELIO."

Instructions within verso ribbon: "LINEAE PERPETVAE ANTE MERIDIANAS HORAS. INTER PVNCTA VERO PO MERIDIANA."

brass

Italy

	Imperial(in)		Metric(cm)
Height			8.5
Width			8.7
Depth			0.9
Diameter
Circumference

	Imperial(in)		Metric(cm)
Height
Width
Depth
Diameter