CO129-181 - Governor Hennessy - 1878 [1-8] — Page 75

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74

the

gravel as a

foundation for the

ball, it has not been considereds

}

greater depth than

sex bed.

mossary

to

down to the rock

Jo

for

a

4

four feet

A 1

cven where it is only

below the

gravel.

du such places therefore, as Cross Sec. hous 24. 25 and 2.8 (Drawings hos 12 and 13) it is proposed to sink horizontally continuous planking on edge kept up

possible by

where

Sharp stakes, to retain the

ground

while the trench for the concretes is being dug out to depths varying

with the degree of hardness

gravel.

ག་་

contains a

stones and

of

the

In the places where the latter

quealer proportion of larges

where it was found

trisnely hard to bore through it is not

the concrete to a

propoveds

lay

greater

#

3 feit below the

But at Cross Section 24

length of about 40 feet and where admixture of course

Mark

found and where the bottom was

But th

Borne

what less hands the conerite will be

widened and diepened.

Drawing Nr. 12.

ned as

shean in

There is another place of

the

same kind

20 feet long at Cross Section 19 wheres

OK

of

the shallow depths of this

account.

rock below the sea

bed it is sug-

gested to found this concrete

the removal

discelly, if after the

footings

old fr

it is ascertained

it

伊装

of

the

bosing that the pock surface his sufficiently level.

The temporary casing will be lined. with; tarred cotton cloth to prevent

bush