Wellington Philosophical Society. 455 
required before any assertion can be supported as to the superior conve- 
nience of a dock. 
An abstract of a paper, by James Balfour, C.E., Marine Engineer, “On 
the Merits of Graving Docks,” was then read, and both papers were discussed, 
the following gentlemen speaking on the subject:—Dr. Hector, Captain 
Vine Hall, Mr. Travers Mr. Crawford and Mr. R. Pharazyn. 
