'''Jam Matahari Whitehurst & Son''' dibuat di [[Derby]] tahun 1812 oleh sepupu [[John Whitehurst]].<ref name="Glover599">{{en}} {{cite book |last=Glover |first=Stephen |title=History of the County of Derby |editor=Noble, Thomas |publisher=Stephen Glover |location=Derby |year=1929 |pages=599 |url=http://books.google.com/books?id=nqNCAAAAYAAJ&pg=PA599&lpg=PA599&dq=Derby+Whitehurst&source=bl&ots=JCVIe8A9JA&sig=EEvx6XdgaQMDv0ReR2D2V8q55eI&hl=en&ei=u3yoTe_SOYGy8QO77JCnBg&sa=X&oi=book_result&ct=result&resnum=3&ved=0CCcQ6AEwAjgU#v=onepage&q=Derby%20Whitehurst&f=false |accessdate=2011-06-01}}</ref> Sekarang berada di [[Museum dan Galeri Seni Derby]]. Ini adalah contoh bagus dari [[jam Matahari]] yang menunjukkan [[Waktu Matahari|waktu lokal]] dengan skala yang menunjukkan [[waktu rata-rata lokal]] (''local mean time''). Ketelitiannya sampai mendekati menit.
== Pembuat ==
Baris 75:
{{reflist|2}}
;Bibliografi
* {{cite book |author = Mayall RN, Mayall MW |year = 1938 |title = Sundials: Their Construction and Use |edition = 3rd |publisher = Sky Publishing |location = Cambridge, MA |isbn = 0-933346-71-9}}
* {{cite book |author = Rohr RRJ |year = 1996 |title = Sundials: History, Theory, and Practice |edition = translated by G. Godin |publisher = Dover |location = New York |isbn = 0-486-29139-1}} Slightly amended reprint of the 1970 translation published by University of Toronto Press (Toronto). The original was published in 1965 under the title ''Les Cadrans solaires'' by Gauthier-Villars (Montrouge, France).
* {{cite book |author = Waugh AE |year = 1973 |title = Sundials: Their Theory and Construction |publisher = Dover Publications |location = New York |isbn = 0-486-22947-5}}
