Plat a 10.

C.ST L.&. N.O.R.R.

Cairo Bridge.

DIAGRAM SHOWING RATE DR PROGRESS IN SINKING CAISSONS.

JDotted Lines /887.

Hilt -Lines /888.

JANUARY

JUNE

JULY

AUGUST

SEPTEMBER

MAY

NOVEMBER

APRIL

FEBRUARY

MARCH

DECEMBER

of j&ta qe of Lliver.

fto/tttn If/OO feci Mote JLow YFrffer

’ /O.O.SS '■ adore ?nen/i Side af Lti/azi.. 1/ts-f.

ROBERTA.WELKE PHOTO-LITH 178

.GAM ST NY.