IPS INDICATED BY LETTERS OF REFERENCE 
Lorren ov Revennxce, | B ¢ D F F G i 
Date of build | 1856 1 1851 | 1 1855 1857 
| Built ron | : i ; iron 
| Propelled by screw rm 3 ow 
| Longth 326-4 19 0 2003 a2 2378 y 
| Breadth I3.1 401 i 0 ) 162 ‘ 
| Depth of bold °5°g 10:2 100 ae a, a 
Tonnage gross | 3 2 2107 2 1007 1710 
| Nominal horse-power 500 F ) Fi 400 0 200 
Numbor of cylinders a 3 3 2 J 2 2 
: Diameter in inches 82 0 70 in ra Oh a6 
3 Stroke of piston in inches “ 72 4 aa ry a a ‘6 
5 | Revolution of propeller for ono of en 5 - i are i 
| Air-pump diametor 7 by n 31 1 Shiv doin 
Air-pump stroke Q 204 oojin, tin ‘ 3 
= ls Number of nir-purmps a. j|eats 3 F 5 ; : 1 
: Displacement of piston 2 | | | | 
EI Diaplaoecenb AE gingarn S| 12 | 198 1398 | ove | no | ao | a 
& Vacuum maintained! | | 
= Feed-pamp 5 | gop 254 u ss 8 
4 Feed-purmps, nuraber of atl) a ‘ 2 | 2 eels a 
& Displacen f piston ) | | | 
~ = = | 003 | 26 248 vo | 175 us 110 
g Er; a eens =R 22 , 2 iio, | 48 Lins 2 | w 
as = Exhaust from each cylinder 204 «10 | 17) « 10 | 17 t}1 nN] 13 wi 12 
a : Diameter of exhaust = D 197 198 1 | 310 200 277 215 
= = Slido-valve travel UL ) ce 8h 
= = = | Length of =D 43 > | 0 yi ae 
eRe 2 A SES 2 3 | Width of ait rr 085 007 ova 003 058 013 
= = a — = = | Arca of piston + area of port 20) 208 193 
a : 5 2 s= 2 23 8 z | 1=D 0200 Ost | | -o9s 030 
= : i | t off at ) | re ry 
| Diameter of propeller 1 rer. | aurea lu it. | 16M bin 
yy | Pitot of ditto 1 20f 29 18f 18: 1 9 21 
| Total firograte, feet 408 260 270 | 143 1h Mt 
| =p 43 4 sor | “¢ 762 | 44 
Total tal il 6500 200 so | ) 3600 HOT 
== /z | =n D+ 207 2g 202 | 5 | ons 1Ba 
sli = Firegrate 21 9 | oa | 292 213 
zlt | Pressure in ¥ lors 10 iL 16 15 
23/2 Revol 17} } % | 2 
us | Revolution of propeller per minut il 40 yt 
Velocity of piston, feet per minute | 213 7 Oe es 
Fe Velocity of propeller, knots per li {| 102 | 108 | ops | 
| 5 Velocity of vessel, knots per hour |} a | 105 90 | 
| 5 Indicated horse-powor sesse Mba au 830 | 1010 | 5 | 
| 1 Coals per ton per hour | 403 | 116 | ane 
| z : Coals per foot of firegrate pe | wr | 65 | eet al) 
S + © Not given, but it varies from 22iu, to 28in, 
HP Y > 
7 fone US he i ee WS 2 3 
3 2 = s fe ¢ 88 
: = a ROYAL (WEST INDIA) MAIL PACKET COMPANY, | Pi 
F oo Peer sk 2 EP Seeers, 8 SUMMARY MADE FROM THE TABLES OF DIAGRAMS FROM INDICATOR, AND WORKING OF THE ENGINES BELONC TO THE VARIOUS SHIPS INCLUDED IN THE RETURN FURNISHED OF d 
—————— - = THE PERFORMANCES ¥F} THOMAS TO SOUTHAMPTON BETWEEN JULY 30, 1862, AND JUNE 30, 1883, AS GIVEN IN TABLE + } ? 
trea : x = i % 2 4 | ] | 2 2 
os 3 | || | = Sf 
= Te ass 2 3 a a 8 4 at oats Dato, Nastx oy Sir, | = | Grate of Exp | | Rewane, 
es | | te 
ieee (es) 0S) og) ae) ee eee Sh ee a 2 ee | 5 | aaa 
poe | E 2 | =, | | 
= ee > | Ee =) | | | 
So | ;— |- | ——|—— ||} f 
alge | tbr, | ibe | 1 wt. aew. Ibe) Ibs, | tbe ~ ard 
; ape AED] Atrata | 70 | a4 u at & Quil 7080 | 11:45 | 104872 | 2007-44 68 221 | 1008 | 967 115 | 1785 | Wind on bow, and occasional eal, | 
mB | Shannon won| 774 | 1205 | 10 F.S.$ throttle | #807] 19045 | sove7 | Joa 214] oot | as oor | -a1|{ Wind and seabefora beam, Mowing bard rah 
TBH ind Seine lst S212 | rasa | 125076 | | 09 | ov | a 1089 | 93:4 | Bow wind, fine, 
13th Tasmanian 18in, & Qlin, 3096) 928 | 40433 | 1219-99 a7 10455} 182 | Light head winds, and calm. 
2 y 45th cu) Atrato Ast, Gnd, & Sed | 51025 | 1055 | o47I95) 18912 10085 | 1082 1103 | 207 | Light beam and quarterly winds; sails set 
—— == yy BOL oss.) La Plate Int € 4th 752 | 10835 | soue7 | Y7a77a 60 601 10:26 | 120 | Head andvariablo winds: ieavy sea 
E Mtb.) Seine reog | ivaia | 124576 | 1906 \7: 10385 | 3316 172 85 | Beain andl quarterly wind; heavy sea sails at eral; 
- Jo» Ath ..] Toamanian ain. iin, | 3640] vos | aoa2 | i700 | 65 883 | 5399 | 6295 | 1075 | 1756 | Light Head winds, occasiounl fair wind; sails st m rani, 
Z g } 4 doth Atrato Int & Qad ov26 | 1201 | 107433 | 73 1074 os 1135 | 910 | Light bead and quarterly wind; sails 
Ith ,...../Shannon PLS. Lat 127007 | 70 1018 1158 | 178 | Shifting wind; swel), aud fine weather 
= : Sein 189095 70 83 11°33 | 19°85 | Beam and bow winds; fine 
5 Lasmauian ‘ 50021 OL 975 10 o16 Head and Night fair wit 
» sith Atrato 1 f 10iFSL | I rat 1045 xu starbonnl and head, 
17th Shannon B.S, & 10910 | 1954 | 194902 | 4 03 | 9 0 | 7,9 of 10 | yoss | 1975 ly: wind Pinup wt 
joy GH oe) Landay 2nd & gr Fil” 10002 | tossts ) mse24! gusra| 0 0 | 73.2 o| 9gps| lee 19 1; hish sce; «ailewet 
Jom Ret so} Moxnnian , ov7y | 10007 | surat 20 | 3 0 (03 234! oBTs| 4 e734 290 Hs, ingot wat : 
phe at Atrata 11277 | 97419 138/09 0 /71 1 0) Iw} gea2 10775 | 1995 RA etd pane ae 
nw 18th Sh 182: 19871 2474 7803 | O63 219) gay wis | we catitor; plain sails set 
» bth Za Plata i 108302 23} 00/00 00) ge | ass ¢ Wis | 1185 Lenin; light uirs and fine. 
17th ‘Tasmanian 1o | S341 | 160023) 3o=m0 | 3 o-) 03 a Ol gages] aes | & 10725} 20°3 | Head'aud bow winds, nuit sea, 
|» goth Atrato P.8, £2ui O} 1107 | o142 ) re0sst'| 71938)| 0 0 |71 1 oleaoms| aos) Go | avo.) a74 onrd anit quarterly: ils cet 
10th Shannon BS.G1t 10051 | 1040 | 19213 | so120 | 798} 9 0 | 09 a0 | 101 vos 1/1 | No winds fine weather, 
| Both La Pinta Lt ovr | 10540 | 6 | s23 | 9 0 m0 0! ow 07 03 | Bow wind, fore anil aft nails sot 
