( Si )

I extract from a French work* the followingdimensions of boats, recommended for the con-struction of bridges on the Danube , the Po,and the Tanaro :—■

French Measure.

For the Danube .

Feet.

In.

Length

GO

0

Extreme breadth .

12

0

Depth .

2

10

For the Po.

Length

50

0

Breadth at bottom

10

0

at top

12

0

Depth

2

6

For the Tanaro or Taro.

Length of keel

22

0

Extreme breadth .

8

0

Depth

;i

i

The two first are far beyond what is necessaryfor the purpose of constructing bridges, and are,I imagine, given only as the dimensions of theboats generally used in navigating those rivers.

dent to us, that a bridge constructed upon a straight line willhave all the solidity required, if the necessary precautions areobserved in laying it.”— Hanbuch der Pontonnkr JVissenschaf-ten, 2ter band, seite 24.f The Aide Memoire.