CO129-181 - Governor Hennessy - 1878 [1-8] — Page 59

30

stones have roughly dressed level

beds and

set in mortar

derably hydraulic, that is to

з не?

...

sany

the mortar would have been per - felly hydraulic had there been less sand in it. In the Praga Cast-

all the headers

while

"chrough" clones,

a^l

the best

only

one

them extend the whole

of

the wall,

but even

this feature

/

the strengths of

Section

of

half of

thickness

in the latter

༧༥

Covely enha

the structive

Brods

which is

given

in photo-

длядов на св

The thickness of thes

courses varies prom 19 to 15 inches

but the exping

Cour sk

is

Gule

18 inches thick and consists of

Covering stones about four feet square cxtending back the full depth of

the

wall.

4

SHEWING

CHARACTER OF

MASONRY

PROPOSED TO BACK WITH

CONCRETE.

ÖN

PHOTO