Davis quadrant (backstaff) (c1700-25) from England invented by Captain John Davis (late 16thC) first device to allow calculation of latitude without need to look into sun at Royal Ontario Museum. Toronto, ON.

Davis quadrant (backstaff) (c1700-25) from England invented by Captain John Davis (late 16thC) first device to allow calculation of latitude without need to look into sun at Royal Ontario Museum. Toronto, ON.
Photo by Jim Steinhart © 2023, all rights reserved. (Ref: ONTR6711)

Click an index below to see this photo among related images:

Royal Ontario Museum Canadian Antiques

license home subjects tips