In the army song, we sing about a caisson.    From LearnThat.org. 

With engraving of caisson for deepening the river.    From Wordnik.com.  [Scientific American Supplement, No. 447, July 26, 1884] Reference

Fig. 56 shows the arrangement in detail at one caisson.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

The pieces were put into a caisson, and the orders executed.    From Wordnik.com.  [Napoleon and the Queen of Prussia] Reference

The caisson is of sufficient dimensions to receive 69 shells.    From Wordnik.com.  [Aeroplanes and Dirigibles of War] Reference

If 3×6-in. lagging is used add 50 cts. per lin.ft. of caisson.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

We see the swift plunge of the caisson within the dim background of haze.    From Wordnik.com.  [Continental Monthly , Vol. 6, No. 1, July, 1864 Devoted to Literature and National Policy.] Reference

Federal caisson was blown up, which brought forth a louder cheer from us.    From Wordnik.com.  [The Story of a Cannoneer Under Stonewall Jackson] Reference

Each of these guns required a team of eight horses and as many to a caisson.    From Wordnik.com.  [The Story of a Cannoneer Under Stonewall Jackson] Reference

He stood leaning against a caisson staring at the letter, his face deathly white.    From Wordnik.com.  [The Greater Love] Reference

The back carriage of the caisson carries two chests like that of the fore carriage.    From Wordnik.com.  [With the Naval Brigade in Natal (1899-1900) Journal of Active Service] Reference

On the North caisson 5,693 cu.yds. were placed in 46 days worked -- 124 cu.yds. per day.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

From the above data the following figures of cost can be arrived at, assuming a 6-ft. caisson.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

These shaft holes were 80 ft. deep on the South caisson and 100 ft. deep on the North caisson.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

Military personnel also salute during the passing of a caisson or hearse in a military funeral.    From Wordnik.com.  [The Armed Forces Officer Department of the Army Pamphlet 600-2] Reference

The caisson was then filled with concrete through the tremie which was handled by a traveling crane.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

Table XVII shows the itemized costs for one caisson and Table XVIII shows them for the other caisson.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

The manner of mixing the concrete and of handling it to the caisson varies of course with almost every job.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

This left holes 5 ft. ×6 ft. extending from the roof of the caisson up to Mean H.W. which were filled with concrete.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

There were placed in the South caisson 3,827 cu.yds. in 32 days of actual working time -- 120 cu.yds. per day of 10 hrs.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

For a 6-ft. diameter caisson these hoops are ¾ by 3 ins.; they are made in two parts, which are bolted together as shown by.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference

After each caisson was built it was towed to its proper site, where it was held in place by temporary pile dock built completely around it.    From Wordnik.com.  [Concrete Construction Methods and Costs] Reference