Page:Transactions and Proceedings of the New Zealand Institute - Volume 1 (2nd ed.).djvu/489

Rh required before any assertion can be supported as to the superior convenience 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. E. Pharazyn.