7 Days. 28 Days. 3 Months. 6 Months. 1 Year. 7 Days. 28 Days. 6 Months. 9 Months. (a) and (b).—The slaking was effected respectively under conditions (2) and (3) outlined in the Paper (p. 66). TABLE XII.—TESTS OF SPECIMEN PIECES OF LOCKING-BAR PIPES. TABLE XIII.-TESTS OF BRIQUETTES MADE FROM STANDARD SAND AND FROM SAND USED FOR BULLA BULLING RESERVOIR CONCRETE. The President. Mr. Carruthers. Discussion. The PRESIDENT moved a cordial vote of thanks to the Author for his Paper. Mr. J. CARRUTHERS observed that the Paper was so complete that little could be added to it. The most striking point about the undertaking was the great courage of Sir John Forrest and his Government, in undertaking so unexampled a work; especially when it was considered that in Western Australia, as in nearly all the Colonies, and even nearer home, things proposed by the Government were made into political questions, and were attacked with great vigour by the Opposition. The proposal to pump water for 350 miles naturally offered an excellent opportunity for such attack, and of it full advantage had been taken. Not only had the scheme been criticized as a whole, and the advisability of carrying it out been questioned, but throughout the whole construction of the work the closest watch had been kept for any opportunity of attack upon the methods of carrying it out. When it was remembered that, in spite of all this, practically no fault could be found with the execution of the work from beginning to end, he thought there was good evidence that it had been carried out with great care and skill. The principal credit for that must be given to the Chief Engineer, the late Mr. C. Y. O'Connor. But the ablest chief could do little unless he was well supported; and the careful and skilful manner in which all the details of the work had been designed and carried out by those in the Colony reflected the utmost credit not only on Mr. O'Connor and on his successor, the Author, but on every officer of the Public Works Department of the State. Mr. O'Connor's estimates and proposals were referred to a Commission, consisting of Mr. Deacon, Professor Unwin, and Mr. Carruthers. Mr. Mephan Ferguson's invention of the lockingbar pipe was then in quite an experimental stage, as only a few short pipes had been produced by his method, and those had been made by hand. It was uncertain whether the machinery could be made for manufacturing pipes on a commercial scale as well as they were made by hand; and the Commission, while recommending the Government to approach the inventor with a view to experimenting in that direction, assumed in the meantime that riveted pipes would be used. On account of the great length of the line and the enormous number of rivets that would be |