Section H. 
ENGINEERING AND ARCHITECTURE. 
1.—THE MONIER METHOD OF CONSTRUCTION. 
By J.-J. Nopie Anperson, B.A. 
2.—RESULTS OF FIVE AND A-HALF YEARS’ TEST OF 
VARIOUS BRANDS OF CEMENT USED BY THE MEL- 
BOURNE AND METROPOLITAN BOARD OF WORKS. 
By Caper E. Ouiver, M.C.E, anp W. Percy WILKINSON. 
[With Folding Table and Plate XTI.] 
At the outset of the Melbourne and Metropolitan Board of 
Works, in 1892, a cement specification was drawn up by the 
authors. This specification provided, amongst other things, 
for the method of sampling by augers. j 
On the chemical constituents of the cement great stress was 
laid, and the results tabulated summarise 154 analyses. 
The standard of fineness was fixed very low, even at that. 
date, not more than 10 per cent. on a sieve of 2500 mesh ; 
specific gravity of not less than 3.00. 
The seven-day tensile streneth between limits of 350 Ibs. per 
square inch and 500 Ibs. 
The twenty-eight day test 450 and 700 Ibs. 
Pats mixed neat on glass kept in a moist heat of 90 till set, 
and then placed in a bath of 100 dee. Fah., or in air, to show no 
signs of blowing or cracking. 
The cements, the results of which are tabulated, do not by 
any means include all the brands used by the Board, but only 
those of which, at the commencement, sufficient briquettes 
were made to allow of tests being conducted over long periods. 
Before enumerating the results it may be as well to describe 
the methods adopted in testing. 
MerHop oF ANALYSIS. 
1. Weigh 0.5 gramme of cement into a beaker, add 30 cm.3 
hydrochloric acid, shaking constantly during the addition, 
