CONTENTS 
Page 
INERØDUGTION ...: се EEE RN RE AT Be Sane Gee ere faire 81 
Basis of the formal treatment of the material — Cartographic object of the 
expedition — Inventory of instruments. 
CHAPTER I 
The Work in the Observatory. 
дне SODSETUGLOLY ete CS ue ere Ole Det ee 88 
Universal instrument — Watches — Thermometer and barometer — Electric 
light. 
BPSPLBITHGL OIL Of ADAM TE ee te se bte mono ee ere MANS DE 101 
Example of observation and computation. 
Derernunation of timea.the verlical\of a polaris kar sin... TTC ee 103 
Clock comparisons — Thread intervals — Azimuth tables — Examples of 
observation and computation — Abbreviated computation — Rate of the 
watches. 
Determination of longitude by transits of the moon and an adjacent star...... 118 
Principles of the determination — Preparations for the observation — The 
carrying out of the observation — Preliminary computation — Example of 
observation and computation — Summary of results — Mean error. 
ОВОС RS SE ee à ТЕ. 130 
von STERNECK S method — Preparations for the observation — Observation 
and computation — Result and mean error. 
AST OTOIMICOLETE TABLIER OTEMC ЕО о. ae ee 136 
Earlier investigations by BøRGEN and COPELAND — Investigations by the Dan- 
mark-Ekspedition. 
ПЕРЕТА ESTG eres A ra ENE он A ee AS DER ae а 147 
Reciprocal, simultaneous zenith distances above land and water (ice) — Rela- 
tive determinations — Absolute determinations at the sea horizon — Critical 
remarks on the observations — Variation of the co-efficient of refraction ac- 
cording to the season — Variation of the co-efficient of refraction according 
to the time of day — co-efficient of refraction and actinometric difference — 
Examples of anomalies of refraction — Concluding remarks. 
CHAPTER If 
Base Measurement and Triangulation. 
Base: METSUTEMEN D SERRES PEL ео SO Tee Sk 199 
Inıangulalıon SurdeymgKoperalionsi sok Ce ke ee ee ee 202 
Computations of thestmanoniaiionenel ns. ee 211 
Eccentricity — Base net — Triangulation net proper — Accuracy attained — 
Inclusion of the observatory in the triangulation network 
mevelungs of the тантал р о. 225 
РОТОР ОТ ПЕРЕВЕСТИ Е et EE TR SSO et De 230 
Geographical co-ordinates of the triangulation stations........................ 233 
Position Of, HAUSE Ac apr ее 337 
Drift of North» Greenlomdninnammesterigkatwechone.. ные. 240 
