170 Journal of the Asiatic Soctety of Bengal. [June, 1905. 
Temperature at 5 A.M. woe 1090° 
i 5-855 ven 1050° 
Muffle turned out at 5-30 p.m. Pieces drawn at 9 a.m. on J0th 
November, 1904. They had not altered in shape, and showed 
no signs of fusion, They were glazed on the surface, dark brown 
in colour. Were dense and hard, giving a metallic ring when 
struck. The fracture showed the pieces to be solid, not porous 
at all.and was somewhat glassy. ape pieces were strong and 
required a sharp blow to break then 
4, Pyramids were made in hed manner previously described, 
cones. rig Sans ely 5°/, CaCO, and 10°/, CaCO, (19 grams 
e 
9-20 a.m., 9th November, 1 
Temperature at 11 A.M. Ee 930° 
4 41-305 ne 890° 
x 2 ei pea pee es) 
ae 12-25 p.m, aes 920° 
eas 1 3 nee ee 
. 150 930° 
s 15. 5 ii a Oe 
+3 3 - sie 
» B00 «+, oim . Oates 
% 4-15 ,, PE | 
5 870° 
a 5-25 
Muflle turned out at 5-30 p.m. Pieces drawn at 9 4M 
10th November, 1904. 
entical results were given by both pyramids. They were 
sik min glazed, of only moderate hardness, easily broken, giving 
a dull ture. a cee not strongly enough heated to give 
a satisfactory earthen 
The two pyra pieiidie = were recharged into cold muffle, 
mufile lit, at 9-10 a.m., 10th November, 1904. The te mperatares 
were taken with a thermo-couple (a 1 the re tempera e 
having been taken in this way) and also with the W a? opie 
pyrometer. The corresponding readings are given Helo 
"Thermo-couple. Wanner-Pyromete? 
Eide pata at 11 AM. > 10404 sae 
cient —— acest EO oes 
” 12, a» 1000-1100 =. =< Wer 
ee Wanner-Pyrometer 
Wempernang at ee P.M. “a 10°-1130° 1132° 
ke, 090°-1100° 1108° 
* Rai ary PM. ae shee ; 1052° 
