290 I. P. Koch. 
time at all our camping places, often both in the forenoon and in 
the afternoon. The object of this was, among other things, that the 
individual sledge parties, on the return journey, by renewed deter- 
minations of time at the same places, should become able to deter- 
mine a mean value of the rate within the period, which had elapsed 
between two such determinations in the same place. 
This measure did not come to play the part anticipated. The 
sledge parties of Bisrrue and G. THosrrup were, for cartographical 
purposes, obliged to choose other routes for the return journey than 
those followed on the way out, and so only in a few cases did they 
come to pass the old camping sites; Мутлоз ERICHSEN's party never 
returned at all, and my party on its return journey met with such 
foggy weather that only in two places—at Lambert’s Land, 78°09’, 
and at Peary’s Cairn 82°58’ did we succeed in getting determinations 
of time in the old camping sites. 
On the return journey G. Тнозтвор was obliged to use chrono- 
meter 57508 as an observation watch and ordinary timekeeper. It 
must, therefore, be supposed that the rate of this watch has been 
less reliable than that of chronometer 57203, which during the whole 
journey was only taken out in order to be wound and for clock 
comparisons; it is, however, not actually substantiated by THOSTRUP'S 
observations that the rate of chronometer 57508 varied in any material 
degree. (Before we started the daily rate was + 28.4; during the 
return journey it was on an average 05). 
As to chronometer 57203 and watch K the rate is as given in 
the table below: 
| | Intervals: Mean rate in 
lin days at 
Place Local | twenty- Baar -four |Rate before 
of observation | Clock time | correction Doro hours of the} the start 
| of the | clock 
| _ clock | 
Chronometer 57208 
i= == ar Е. EN в о — 
Danmarks Havn ze ont “Th, 18 а. т. | + 59029 у | + 3m518.3 
Е 11.37 am. |224649 80 | 89810 LE SAS 
Lamberts Land .. |7?/IV | 8h.17a.m. + 09 07 | | 
Pot M RAD mil AAA и 
Peary’s Cairn.... 21V | 88.14 p.m. | + 22 
ENG, | 10h.08 a a.m. + 2 où 31 
Wateh K 
Dante Havn. . ler | 8h.00 a. т. + 10 33 |+ 108.6 
er о о + 42 
Lamberts Land .. ЗПУ | 78.84 а. т. + 10 33 62 46 | 47 
NR D CL A NE nz 
Peary’s Сато... У | 50.72 pont 221 | ER) 
ors. | ЗУ | Thlla.m. + 2 16 | ze bar li | 
