Revisi per 13 Agustus 2011 08.13 sunting Sanko (bicara \| kontrib) 4.051 suntingan Tidak ada ringkasan suntingan ← Revisi sebelumnya		Revisi per 13 Agustus 2011 08.24 sunting balikkan Sanko (bicara \| kontrib) 4.051 suntingan →Gnomon Revisi selanjutnya →
Baris 24: ===Gnomon=== [[File:Derby Sundial 5811.JPG\|thumb]] Jam matahari ini dibuat kokoh, dengan [[gnomon]] tebal, satu sisi gnomon adalah penunjuk <ref>{{Harvnb\|Waugh\|1973\|p=72}}</ref> yang menghasilkan bayang-bayang sebelum tengah hari, dan sisi lain menunjukkan setelah tengah hari. Piringan jam tidak dibuat berupa lingkaran penuh, namun dua separuh lingkaran yang dibagi oleh ketebalan lempeng penunjuk. Pada rancangan jam matahari ini, sudut lempeng penunjuk adalah sama dengan [[garis lintang]], yaitu 53° 1′ 49″ garis lintang dari Bridge Hill House. Piringan jam adalah tepat horisontal, penyesuaian sedikit untuk garis lintang bisa dilakukan jika jam digeser dengan mengayun piringan jam untuk merubah sudut dari horisontal.<ref>{{Harvnb\|Waugh\|1973\|p=47}}</ref> <!-- As the dial is now 0° 6′ 49″, or about 1/10th of a degree south- the nose of the gnomon needs to be raised by that amount. This dial is stoutly made, with a thick gnomon, one edge of gnomon is the style <ref>{{Harvnb\|Waugh\|1973\|p=72}}</ref> which throws the shadow before noon, and the other edge is the style which throws the shadow after noon. The dial plate is not made up of one complete circle, but two semicircles separated by the thickness of the style. In this design of sundial, the angle of the style to the dial plate is exactly the same as [[latitude]], which is 53° 1′ 49″ the latitude of the Bridge Hill House. The dial plate will be perfectly horizontal, slight adjustments for latitude can be made were the dial moved by shimmying up the dial plate by the change in degree, from the horizontal.<ref>{{Harvnb\|Waugh\|1973\|p=47}}</ref> As the dial is now 0° 6′ 49″, or about 1/10th of a degree south- the nose of the gnomon needs to be raised by that amount. ===The dial plate=== Baris 68 ⟶ 69: Another Whitehurst sundial dated around 1800 sold for £1850 in 2005 in Derby.<ref>{{Cite web \| date=2005-09-13 \| url=http://www.bamfords-auctions.co.uk/BidCat/detail.asp?SaleRef=FASEPT05&LotRef=1913 \| title=Details of Lot 1913 \| publisher=Bamfords Auction house \| accessdate=2011-06-01}}</ref> --> ==Lihat juga== *[[Jam matahari]]

Jam matahari Whitehurst & Son: Perbedaan antara revisi