From Timeball to Atomic Clock

160 Pages·1983·20.131 MB·English

by  Anthony Dyson

UNIVERSITY OFHQ,NG KONG
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Hong Kong Collection
"/////» Gift from
II '( '. /. H.K. Royal Obseirvatory
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Contents
Foreword 7
Introductton 9
Chap1t BeyrF atrh Bee sStp ot 17
Chap2t Aewra Fyl tyh Heo uses 41
Chap3t OefrC omeatnsKd i ngs 54
Chap4t Uenrh apCphyr istmas 67
Chap5t TehreC lackoiftn hgHe a mmers 87
Chap6t Ferro Tmi mBea ltloA tomCilco ck 101
Appendix 130
B1bhography 133
Index 135
Tleffieeco tcf li0m1a1h tuemc aon1 1hdan1soy1 tecb tte reend uced
toa ne xasccti eBnucstect .a nbneoe tn tidrieslrye igna rded
co11stihldeue srotmHfogo r nyKg o n.g. Ia. mn otth inokfi ng
typhoorso i1m1eislx atrr aovuatgbaounftrt hs wete sa tbhuetr ,
oft h()er dirnoair1yot fti hnyeee atrh;re e gurlaanorg fe
tempearnardta 1n1irtfeha celh la;no gfte h meo nsotohne;
i,warsieaqbuoletfenh s ceee a sons.
G.R .S ayHeornK,go n1g8 41-B1i8r6At2dh,o, l easncde nce
CommofgA geH�o nKgo nUgn ivePrrse1is9ts3y 7 .
6
Foreword
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ObservHaotnKogor nyAg, : B rGieenfeH riasltb oytr hye,
laMtreL. .S tarbAuscskiD,si traenpctut bolrii,sn 1 h9e5d1 .
Otheexrt rhaacvbtees e tna kfreonm realnenvuaanlt
repoorfst usc ceDsisrievcoetft o hRreos y Oabls ervatory.
Furtrheeferr einnccelsut,dh iownsrgei tbtyOe bns ervatory
staaffp,p ienta hrbe i bliography.
Thanakrdseu teo M rI.a n DiAarmcohnidPv,ui bslti,c
RecoOrffidcsoe f H onKgo nagn,hd i sst afoffra, s sistance
witohln de wspaanpodeffi rcsdi oaclu maennldte st ters.
Wheqnu otfrionmwg r itstoeunro cnelmsyi,n cohra nges
havbee emna diesn p elalnisdny gnt toma axk e atchceomr d
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Hong-koorHn ogn gkoTnhgeu. so ef H onKgo ng and
Kowloaostn h oeffi cisaple lolfti hnpegl ancaem weass
officiaadlolpyit n1e 9d2 6.)
Ifiw ta bse litehvaaec tdh anwgoeu alffde tchstee nosfe
thoer igdientafrrloa,mci tto ,rp ossciabuclsoyen fusion, the
origwianlsae ilfn tt act.
Thipso lhiac-syb roa-dbleyefo nl lowwietpdhu nctua­
tiobne,a riinmn ignt dhc eo mmebnyG te offRr.eS ya yienr
an otteoh iAsn EaEsntterrn(e HpMotS 1O9,6 4):
'Genetrhadelo lcyum heanvbtees e gni vaesfon u nbd,u t
occasisoonmmaeil nleoydr i thiabnseg e dno nree garding
punctusilitnmicaoenn1 y,9 Ctehn touffriycs ieaetlmohs a ve
haodn lacy u rsaocrqyu aiwnitttahhnp ecr ei ncoiftp hlaets
art.'
Howevteoar v,o ciodn fustieomnp,e raartgeui rvieensn
degrees Cefolrp seiruislo,od nbsgee vfoertneho effi cial
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onnea utmiicalanehl o urn-oiatms e turniibctu i,tws i dely
useidnm eteoraovlioagatyni,sdo e na farOinneng a.u tical
mili1es. 8k5i2l ometres.
7
Dollmaernst imo ntehtdee xartc HKoonngcg u rrency
unl,ersasot tehde rwise.
Colleiantg huee , InfSoerrmvaDitecipeoasnr tMmre.n t,
GeoffrVe.Sy o mearnsdM r.P hilBlriupca ed,d seudb ­
,tanttoit ahflleal vyoo uftr hb eo obkyp rovihdiisntgo rical
detapialrst,i ciunl arrelleyaa trwileoyan t phtheoer n omena.
Finatlhlayan,rkd csu teoM rJ.o hPne acock,o fD irector
thReo yaOlb servaantdo rsyht,iafo sff.r t heiinrv aluable
assistance.
-A.O.
8