273 
Changes in the Sun’s apparent Diameter. 
parent 
on the 
x 
of that day, thus form- 
by each observat 
tract from the a 
re 
The next step in the, process is to sub 
f ephemeris diameter given 
d personal error of the observer 
Washington and Greenwich. 
The mean monthly residuals for each month of each year 
were then formed and these are given in the following table :— 
error oO 
adopte 
ing a series of residuals for observations both of horizontal and 
vertical diameter at both 
88-0+| ZF-O+) 81-0—| F0-0+| 90-0—| ZF-0—| F2-0—| 88-0—| O1-0—) £0-0— EL-0 + | PP-0O+ jaBven 
O-T+} T-I+] 80+) 9-0+ £-0+)} 9:0-| 80—-| 80—| &0—| 9-0+] 0.0 £-0+ | OL8T 
LEt+| 0-0 6-0—| 6-0+ L0+ ] 0-0 0-0 €0—| ¥-0—| €I—| %0—| 9-0+)| 698T 
€0—| 40+] 1-04] T-0—| §0+ GO| BOF) 0-0 LO—-| 8O0—-| @O—| 9-0+] 898T 
0-0 L-0+] 9-0—| 90+] ¥I—] ‘8qQ0T! TOo—| T-0—-]| 0-0 GO+|] 8I+] 80+] LO8T 
Got; 90+) 410+) 0-0 0-0 9-0—-| PI} 9I—-| 0-0 ¥I—| T-0—| 8-0+] 998T 
LO+) €0O+)] T-0—-| 40—| &0+!] O1—] 0-0 GO—| 6O+| GOtT| GIt+| ¥0O+)| Q98T 
G-O+! 30+] 60—| F-0—|] %20—| 40—| %0—| 80—| 0-0 TO—| PIt]. LO+]| F981 
€0—| €0+| TO0—-| &0—-| LO+] #0—| 9-0—| £0—| 9-0+] 20+] TO0+] §-0—| G98T 
wT + Lo— 0-0 6-0— 0.0 L.o+ 0:0 60+ Ss Sead g.T+ 8.6 + 6.0 + GO8L 
600-0 —|0€0-0 + |9€0-0 + |UBE, 
ns | emer ne | renner | ase | to sana | mieten | senna 
100+] 10-0+}| €0-0+] T0-0+] 600+] 20-0+] 20-0+ | 90-0—| 20-0—| 10-0—| G0-0+| 0-0+] OL8T 
00-0 T0-0+)| 200+] 20-0+] 60-0—| T0-0—| 20-0—| 10-0—| 00-0 £0-0+)] 10-0+) #0-0+) 698T 
£0-0+} 10-0+]| 00-0 10-0—| T0-0+ | ¥0-0—| 60-0+} 80-0—| 10-0—| 90-0+)| T0-0—| $0-0+] 898T 
40-0—-| ¥0-0+)} 00-0 20-0+| 10-0+]| 849 T | €0-0—| 00-0 £0-0—| 10-0+} 00-0 00-0 | L98T 
OT-0+} F0-0+) 10-0—| €0-0—| 80-:0—| 10-0+]| 20-0—| ¥0-0—| €0-0—| 10-0—| €0-0+] O1-0+]| 998T 
800+] 100+] 10-0—| S1-0—| 10-0+)| 20-0—| €0-0+]| #0-0+| 90-0—| 00-0 £0-0+)| 90-0+)| e98T 
60-0+}] $0-0+] 90-0—| 10-0—| 00-0 0-0—| 90-0+| $0-0—| 00-0 £0-0—| 60-0+)| $0-0+)| P98T 
$0-0+] 90-0+} 10-0—| €0-0+}| 20-0—| 00-0 10-0—| O1-0—| €0-0—| 10-0+| ¥0-0+| 20-0—| €98T 
£0-0+} €0-0+] 90-0—| €0-0+| F0-0—| 100+] 10-0—| OT-0+| 90-0—| 90-0—| 90-0+! €0-0+)| Z98T 
‘S ‘8 ‘s ‘s st ‘s ‘SB 8 ‘s ‘s 8 ‘Ss 
‘00d AON "400 ‘qdog | ‘4ysntiny | ‘Ame ‘ounp “ABW ‘Tady | ‘qorveyy qoa ‘uve =| “1BOx 
‘HOIMNSSYD) :YXLANVICE TVLNOZIHOTT 
n are given below. 
iod which is proba- 
ospheric influences. 
peat 
peri 
atm 
1n 
Washi 
er has shown, by 
18 
eans show a d 
—T HIRD SERIES, VoL. Vill, No. 46.—Oct., 1874, 
as W. 
ponding data for 
ese monthly m 
caused, 
Am. Jour. Sct. 
The corres 
Th 
bly 
