120 Transactions.— Miscellaneous. 
limes; perhaps it was a little more energetie in the former, but the differ- - 
ence, if it did exist at all, was scarcely perceptible. The wet samples of 
unmixed limes had expelled the surplus water they contained—which is 
what is technically known as having “ set "—in three days, and in fourteen 
days they had acquired the consistency of soft bricks. The pure samples 
in air hardened without cracking, and were comparatively insoluble in 
water on the fourteenth day. On the other hand, the Waihola limes in 
water never set at all; they were softer on the fourteenth day than when 
immersed, the pure sample in the air cracked and crumbled in setting, and 
all the air samples were quite soluble. The above results, taken in connec- 
tion with the chemical test, place this sample of the Peninsula limes in the 
class of eminently hydraulic, as fixed by the best authorities. 
Nos. 12 and 13. Dark fawn, compact stone, analyzed respectively by 
Drs. Hector and Black, are evidently the same article ; it occurs associated 
with No. 15 in the second highest bed at Macdonald’s quarries. As will be 
seen from the table, this stone resembles closely the blue Lias of — 
in Wales, their essential constituents being as follows :— 
Aberthaw | Peninsula 
Stone. Stone. 
Carbonate of lime  .. x ES e "es S A 86:20 86:05 
Clay .. re ee ae aA " 11:20 11:67 
The Otago specimen has 21 per cent. magnesia in addition, but this is 
not à fault. Mr. Armstrong informs me that the dark Peninsula stone 
resembles in appearance the hydraulic limestone of Burdie House, in 
Midlothian. 
No. 14. Drab granular stone from the lowest seam at Dowling Bay. This 
eorresponds in quality with the second highest bed at the Glenmore quarries 
on the Peninsula, of whieh Professor Black made a partial analysis. It 
should yield a very good hydraulie lime, for although it may be somewhat 
deficient in the ingredients that ensure hydraulicity, it is absolutely free 
from those that are supposed to have a contrary effect. 
No. 15. Fawn-eoloured compact stone from the second highest stratum 
atthe Peninsula kilns. The resemblance between this and the famous Theil 
limestone of France is very remarkable, as will be seen from the following 
abstract of their principal ingredients :— 
Theil, Peninsula. 
Carbonate of lime and — xp e F ne i 82°36 82-03 
p 14:90 14:29 
ra Cg ea a | a m a o 1:70 2-80 
