350 
Sums [a]wt+[ale 
Observer Kam. 
Period 1 | Period! | ‘Period Va’ | ‘Period Vb ‘|Period VI oo 
Numb.of obs. 94—113 58 - 42 62 100 | 270—333 |136 132 
Thread I Se ae — 90 —103 70} oa 
el EN es, —102 —102 —78 | — 89 
vei S18. e100 6 9 oe ae fps | 
ae B —104 —103 — 88 99.) ra 
Mi —40 —116 —129 —116 =0t | wis 
ve HAM, ly LS Hy a 145 age 95% | cine 
ist Half —37 ai be En — 98 7 Peg 
2nd , 2 | A5 — 126 — 99 —95 | —108 
Together —31 | —102 — 108 — 98 —19 — 97 
Observer v. HENNEKELER. 
| 
Period I PeriodII Period Va Period Vb Period VI, Mean 
Numb. ofobs.| 148—166 58—90 113 =175 225--187 | 111—73 
Thread 1 =. 70 ay = 87 — A 46 — 66 
tl aT aes —109 — 64 —46 =a 
oil id NE. —101 ed S31 = 
UR — 98 — 50 En = 40 294 = 162 
OSM — 86 —103 — 135 — 136 —98 is 
ae Vl —104 aa: = E30 — 103 = aR ag 
Ist Half 8 i 100 2 —41 = 166 
2nd , — 96 — 919 ={17 2de —65 —‘9i 
Together ae — 15 —108 — 69 —d3 — 78 
to the accidental error of the observations. The investigation of the 
thread-intervals namely gives + 05141 as mean error of a transit 
over one thread for Kam and + 08131 for HENNEKELER, and thus 
as that of a thread-interval for K. + Os200 and for H. = 0°185; 
