90 Mr. Bond on the Comparative Rates of Chronometers. 
Kors? 3 Previous -|\Rate on Subse- Excess |Number 
a“ Year [tore rate ship-bourd,auent, Jo etn or of aye | General 
numbers. or— | -or— + or — |ship-board.| board. ; 
SSS el ee ee 
Parkinson & Frodsham, 1174| 1828 | — 4.0 | — 9.0 11.0 | — 1.5 | 55 |Assorted cargo. 
+ ae 1179) « — 2.0 0-9 3.7 0.0 55 oa “ 
bo sc 1100) “ 3.0 4.3 5.5 0.0 55 se « 
Os e 900} « 9.9 14,8 16.9 14 | 56 « « 
“ “c 599 << 6.0 6.2 eT — 08 56 “ (74 
Barraud, 2-551) <€ — 6.5 | — 3.0] — 7.4 3.4 | 192 “ se 
Parkinson & Frodsham, 508) 1526-8 8.5 10.5 12.3 0.1 | 677 se ce 
Robert Roskell, 458] 1828 2.5 3.3 3.2 0.5 | 64 se “& 
Barraud, 413] “ 3.5 0.5 3.1) — 28 | 166 se se 
Parkinson & Frodsham, 1028] << 13 0.4 1:99) 93-2 | Ad a Ce 
“ “ec 940 « 2.0 1.9 0.1 “ “ 
ee ae 669) “« — 2.0 | — 3.4 — 14 | 199 ge) oo 
wo B 981; ** 3.5 3.4 3.0 0.2 | 146 dg * 
“« « 1210) « RS 0.4 | — 2.5 2.4 58 oe ~ 
“ec “ 521 << —— ee} — Leal — 126 0.3 74 {3 ” 
KG G 752| « 3.4 6.4 7.3 1.1 | 209 ae <6 
U3 KS 947; 4.7 6.3 10.0 | — 1.0 | 254 ef — 
Thompson, 661; “ | — 2.0 | — 6.0 | — 1.2 | — 4.4 | 200 ss ee 
Parkinson & Frodsham, 430} <“ — 0.5 0:67) ny 1.7 | 167 3 ny 
ce « 832) < 17.0 15.7 16:7 | = 1.1 |) 88 & G 
re OF 599} <¢ 8.1 7.9 7.5 0.1 | 84 fe ae 
a3 09 873) * 1.6 0.6 | — 0.4 0.0 95 a Be 
Richard Hornby 309} « | —2.7|— 44) — 5.7} — 0.2] 42 ue - 
Widenham, 934) « 5.3 1.0 | — 5.0 0.9 | 80 « ce 
Parkinson & Frodsham, 937] *¢ 6.0 Al 8.5 3.1) 57 os ce 
John Wood, 39) «© | — 3.5 | — 2.2 | — 41 1.6 | 214 fs Ge 
Parkinson & Frodsham, 1053) <« — 18 /—18 |—1.8 0.0 | 61 ce ce 
wS Fe 1246) <“ 2.0 4.0 5.4 0.3 61 Ke BS 
s¢ UG 966) << — 10} — 19 | — 1.5 | — 0.6 | 112 ss by 
se ce 1184) «“ AG 4.2 3.9 0.2 68 2 eS 
Fe C3 1088]; “ 4,5 | — 2.2 | — 0.3 0.2 60 by ce 
& « 901} « | — 0.2} — 0.7} — 1.2 0.0 | 50 “ “ 
Brockbank, 412) « —— SH) el 0.4 99 wa ce 
Parkinson & Frodsham, 1210] 1829 | — 1.7 | — 1.5 | — 2.0 0.3 47 fe ss 
& « 1242) « |—1.0|— 26} —28|—0.7| 47 cs < 
ee oS 635| 1828 | — 1.5 | — 2.3 | — 2.4 0.3 | 102 x < 
““c “ « | 1899 | — 2.6 | — 6250] UR Say oats 41 « «“c 
ts cg 1100|  « 2.3 2.1 2.3 | — 0.2 57 2 se 
Ue Wb E215) se — 2.1 0.2 ey 0.7 57 2 ie 
‘ ‘ 1030] « 41 4.2 4,9 | — 0.3 | 202 |70 tons of iron. 
SUMMARY. 
Whole number of Cases 
Number in which there appears to have been an acceleration on the 
mean of the first and last shore rates 
Number wherein there appears to have been a Joss on the mean of 
the first and subsequent shore rates 
Difference F P é 
Number wherein the error did not exceed a second 
Number wherein the error did not exceed two seconds 
Number wherein the error did not exceed one tenth of a second 
