Statements (22)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:scientific_instrument
|
| gptkbp:alsoKnownAs |
gptkb:cross-staff
ballestilla |
| gptkbp:consistsOf |
main staff
sliding crosspiece |
| gptkbp:depicts |
medieval manuscripts
|
| gptkbp:length |
about 1 meter
|
| gptkbp:material |
gptkb:wood
|
| gptkbp:measures |
altitude of celestial bodies
angular distance |
| gptkbp:namedAfter |
gptkb:Biblical_Jacob
|
| gptkbp:originatedIn |
gptkb:Middle_Ages
|
| gptkbp:replacedBy |
gptkb:sextant
gptkb:backstaff |
| gptkbp:used_in |
gptkb:astronomer
navigators |
| gptkbp:usedFor |
gptkb:navigation
astronomical observations measuring angles |
| gptkbp:bfsParent |
gptkb:Levi_ben_Gershom
|
| gptkbp:bfsLayer |
7
|
| http://www.w3.org/2000/01/rdf-schema#label |
Jacob's staff
|