146 



TransaGtion&. 



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. Tlie 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 supi)lementarj steam jet, a .positive pressure on the 

 lower cylinders of from 2 to 3 lbs. 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. 



COMPOUNI> ENGINES. 



c. 



Departure 



from 

 Auckland. 



Dec. 30 



Jan. 11 

 „ 22 

 „ 30 



Feb. 9 

 „ 21 



Mar. 1 



„ 12 



„ 25 

 April 3 



„ 20 

 May 4 



„ 13 



„ 21 





oj 



^ 





fee 



o 





eS 





















o 





A 



ffl 



Departure 



O 



CM 



from 



13 





Napier. 



O 



1^^ 





O 



-^o 





o 



%> 





K 



^ 



m 



50-5 



59 



57 



50-5 



59-5 



48-5 



59 



71-5 



62-5 



54-5 



48-5 



61-5 



47 



54-5 



Jan. 4 

 „ 16 

 „ 26 



Feb. 3 

 „ 13 

 „ 26 



Mar. 6 

 „ 20 

 „ 29 



April 8 

 „ 24 



May 8 

 „ 17 

 „ 25 



71 



75 



60 



59 



53 



51-5 



59 



54-5 



67 



66 



94-5 



58 



60 



70 



131-5 



134 



117 



109-5 



112-5 



100 



118 



126 



129-5 



120-5 



143-5 



119-5 



107 



124-5 



1t)S. 



lbs 



80 





77 



62- 



77 





76 





76 



62- 



78 





78 





77 





77 





78 





78 





77 





78 





Mean 

 Pressure. 



^ 



Indicated 

 Horse- 

 power. 







R)S. 

 10-65 



10-'65 



80 



78 

 79 



78 

 78 

 78 

 78 



77 

 77 

 78 



ni. 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 



51-2 

 51-2 



Coals Consumed. 



Ph 



Tons. 



27-6 



27-5 



24-6 



23-42 



24 



21-4 



25-2 



26-9 



27-7 



25-78 



30-7 



25-5 



22-89 



26-2 



o o 5 



cwt. 

 4-2 



2 

 2 



28 

 28 

 28 

 4-28 

 4-28 

 4-28 

 4-28 

 4-28 

 4-28 

 4-28 

 4-28 



lbs. 



4-3 

 4-3 



4-3 



OLD ENGINES. 



D. 



1871. 





1871. 











Mar. 3 



61 



61 



Mar. 8 



58 



„ 12 



87 



145 



„ 26 



60 







60 



Apr. 13 



56-5 



Apr. 19 



54 



110-5 



„ 25 



57 



May 1 



56 



113 



May 6 



66 



„ 11 



69 



135 



„ 17 



52 



„ 23 



71 



123 



„ 31 



60 



June 6 



60 



120 



June 13 



55 



„ 17 



68 



123 



„ 24 



54 



„ 29 



59 



113 



July 5 



47 



July 10 



62 



109 



It is assumed that the old engine 

 worked up to 100 indicated 

 horse-power, as there was no 

 counter fixed or means of taking 

 diagrams. 



Tons. 



cwt. 



21-6 



7-09 



51-4 



7-09 



21-29 



7-09 



39-17 



7-09 



40 



7-09 



47-85 



7 09 



43-6 



7-09 



42-8 



7-09 



43-6 



7-09 



40 



7-09 



38-6 



7 09 



lbs 

 7-94 



