STATE GEOLOGIST. 230 
difficulty was experienced in reaching the required temperatures, which 
ranged from 1270 to 1400° C. as measured by the Chatelier pyrometer. 
The burning temperature of the cements I to 5 was not determined, 
since the thermo couple could not be inserted in the crucible furnace without 
SONS IKE TO Wane Ware, Wine Chalker “Was cacsiullhy Sormuecl alll 
underburnt as well as fused pieces being rejected. Owing to fear of 
contamination, the cements were ground in a mortar by hand and put 
through a 100 mesh sieve. The cement after screening, however, was 
found to be rather lacking in really fine dust, and hence did not show up 
as well in the tensile tests as cement ground in a ball-mill would. 
The results of the tests are compiled in the following table: 
eT 
; aug | 3 
é | Formula, _ || Appearance of clinker. | 9%" | 
Z| aa | \Eees| 3 
4 | ma |e Q 
1| (3CaO)SiO , (2CaO)Al,0,....... ; 1.21 | Yellowish, fusible. | 49 | Poor 
2 ss 1.90 | Slightly yellow. 187 | Poor 
3 se 2.41 | Good clinker. 180 | Fair 
4 ef 3.08 | Good clinker. ol Sie hair, 
5) es 4.12 | Good clinker. 203 | Poor 
@ (2.9CaO)Si0,, (2CaO) Al 0, 22 Brown Sea ee re en aes Seater Poor 
7 1.93 | Fairly good. 193 Poor 
8 es | 2.42 | Good. 168 Fair 
9 3.09 | Good. | 232 | Good 
10 3.97 |. Good. 230 Good 
| 
ii) (@.seaOO, CNOVALO. | leily | Sie ies. 19 | Boor 
12 fe 1.90 | Fairly good. 228 Poor 
13 és 2.40 | Good. | 305 | Good 
14 ue Slane Good: 221 Good 
15 eS 3.97 | Good. 188 | Good 
17) (2.7CaO)SiO, (2CaO)AI,0,.....| 1.91 | Fairly good. 102 Poor 
18 és 2.42 | Good. | 67 | Poor 
19 ‘ 3.10 | Good. 2, Good 
20 es 4.20 | Good. 225 Good 
