146 Transactions. 
Another important matter in connection with these engines is a loss of 
from 8 to 40 lbs. of steam between the boiler and the engines. The writer is 
at present unable to account for so much loss as this, unless the steam pipes be 
too small. 
Since the trial trip a number of indicator diagrams have been taken, and 
these show, without the supplementary steam jet, a positive pressure on the 
lower cylinders of from 2 to 3 Ibs. per inch; the deficiency is at present about 
3 lbs., lost from condensation of the steam passing from one cylinder to the 
other, and filling up the steam passages in the lower cylinders. 
The fact of not having any steam at or above atmospheric pressure in the 
lower cylinders at first, must be attributable to the steam jackets and inter- 
heater not working properly, probably through some of the cones being left in 
the upper cylinders, or from some other obstruction in the steam-jacket pipes. 
á COMPOUND ENGINES. 
g i glg g g STERE 
F 7o 3 ean = Fotoe | 
g Coals Consumed. 
g = = 5 g 
e in Departure 2 pe Š H S A] 6 = y h BS, 
from E from Bon g\2|8 pA geen ee ag el g Eria 
Auckland. | | | Napier. O | óS k- Pa 2 i Pa 2 H hee 
= Bae a ed a = g E 2 = 5 Eos 
z Sloe #1 S18 | 3] 2 S| & | mies 
S Cee io E a ee ee ee ee e 
Z >e Iaa [aleteral «1a 
Ths. | Ibs. | Tbs. n. Tons.| cwt. | tbs. 
Dec. 30 |50°5 | Jan. 4 131°5 || 80 A, 4 a 4° = 
Jan. 1159 | ,, 16175 |134 || 77 \62-510-65| 78 | 24 | 56 [51-2107°5 | 42| 43 
i 7 | 5 96l60 (17 | 77 eee a . 246 |42| 43 
s 5 | Feb. 3/59 1109 ie See A Ee Pb ee ... (23°42 | 4 ay 
Feb. 91595] ,, 3 |1125 || 76 \62-8)10-°65 | 78 | 24 | 56 (51:224 4 4:3 
» 211485| ,„ 261515100. || 78|...| ... |78| 24 o. (21-4 | 4-28]... 
Mar. 1|59 | Mar. 6/59 {118 78 78 | 24 M Tp Aa E h 
o RISI- 20154:5126 77 77 | 24 26°9 | 4 
a 20 675 29 129°5 | 77 77 4 ZIT IE 
April 3 |54:5 | April 8 66 |1205 || 78 78 | 24 - (25°78 | 44 
„20 485| ,, 24 |94°5143-°5 8 ce. EA ram bs | Say dae te: 
May 4161°5|May 8/58 |119°5 | 77 24 . 255 | 4: 
ee ee 0 [107 || 78 24 _ 122-89 | 4+ 
s AkO] „ 25170 124 24 zH e 
OLD ENGINES. 
B. D. 
1871. 1871. Tons.| cwt. | Ibs. 
Mar. 34 61| 61 21°6 |709/794 
Mar. 8. 58°) o 121 87145 5'4 |709) ... 
s- 28 |. 60 Eo OO Iti a eera os the old engine |21°29 | 7°09 
Apr. 13 | 56:5| Apr. 19| 54 110°5 orked 100 indicated (39-17 | 7:09 
3 25| 57 | May 1} 561113 boni ige p there was no (40 7°09 
May 6/66 | ,, 11! 69 (135 counter fixed or means of taking 47°85 | 7°09 
AU. Woe oS peat, 3 car 8d ra diagrams. 43°6 | 7°09 
| y 381! 60 | June 6| 60/120 42°3 |7:09 
Junel3| 55 | ,, 17| 68 (123 436 |7-09 
ee 54 ig 113 709 
5| 47 | July 10 62 109 38:6 |709 
Pd 
