Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Lens
|
| gptkbp:category |
Lens
|
| gptkbp:diameter |
433 mm
|
| gptkbp:height |
150 mm
433 mm |
| https://www.w3.org/2000/01/rdf-schema#label |
Sixth order Fresnel lens
|
| gptkbp:introducedIn |
19th century
|
| gptkbp:inventedBy |
gptkb:Augustin-Jean_Fresnel
|
| gptkbp:lowerAward |
gptkb:fifth_order_Fresnel_lens
|
| gptkbp:material |
gptkb:glass
|
| gptkbp:order |
sixth
|
| gptkbp:rank |
none
|
| gptkbp:usedFor |
harbor lights
river lights small beacons |
| gptkbp:usedIn |
lighthouses
|
| gptkbp:bfsParent |
gptkb:Cheboygan_River_Rear_Range_Light
|
| gptkbp:bfsLayer |
7
|