CO129-181 - Governor Hennessy - 1878 [1-8] — Page 114

113

Discarding sands as natierally inert

and seeking

ingredient that woulds

exercises upon the lines, influencer

similar to that

Ú H

the brass of Ger-

made

of the many

puzzolana of Staty a second set of experiments was with the red clay of Kowloon as highly ferruginous silicato

containing but littler or

lime, magnesia,

or potash.

there the mortars were

of

alu-

found, to

2.0

w

have set in three weeks but at this

end of five months they

sufficiently good.

hard or

seatrive

trie for

LOCAL

not

lough to make

for concrete. Du

the year following having had oc- casion to best some limes imported from the lime stone region above

the della

the Canton River, but

which

which

are not

generally

met with in

commerce here, owing to the local

shell lime being

so much easier.

and cheaper to get, a third set of

experiments

wwe made with the some

ferruginous clay,

a markeds improve

owing

doubtless

ment being the result to the original presence of clay in the stove time. Betting

occurred) un-

der water in his days, the mortar

requiring great tenacity already in

the third mouth. This result was

sufficiently satisfactory to justify the erection of

A

small dea

of the below lands in

wall

Juas V in the

proportions of of parts broken stoner to 1 of ferriginous clay

of

the lime and the structure has cons

tinned to hardens under water in