John P. Holland’s First Submarine

was launched in 1878,

a one man craft with engine which after a series of trials was sunk in the Passaic River at this spot where she lay buried until raised in 1927 by a group of Paterson youths who presented ...

Frank Padget

In memory of Frank Padget, a coloured slave who during a freshet in James River in January 1854, ventured and lost his life by drowning in the noble effort to save some of his fellow creatures, who were in the ...

D Retort and Condensing System

The D retort, line the rotary furnace, was used to recover mercury from cinnabar ore. Whereas the rotary furnace was a continuously-operating system, the D retort was loaded with ore, fired for a period of time (usually 8 to 24 ...

Frank Padget Water Tragedy

Heavy rains in late Jan. 1854 left the James

River and the treacherous Balcony Falls in

full flood. On 21 Jan., the canal boat Clinton

and its passengers became stranded in the

raging waters. Frank Padget, a skilled

boatman and slave, led four other men ...

Hoeing Table and Cleaning Tank

Hoeing tables and cleaning tanks were used to purify mercury as the final step in the process of converting cinnabar to mercury. Mercury collected in the condensers of a furnace or retort was contaminated with soot, water, dust, sublimed sulphur ...

Shaft Drill Core

1935-36

Experimental vertical shaft 5’ in diameter to 1125’ depth thru serpentine and gabbro at Idaho-Maryland Gold Mine, Grass Valley. Machinery invented by J.B. Newsom. Greatest drilled footage – 21’ in three days. Core weight 11-tons. Donated to Nevada City by ...

United States Merchant Marine Veterans

In memory of

United States

Merchant Marine Veterans

of

Foreign Wars

Courtesy hmdb.org

PFC Floyd Everett Campbell

In Recognition of the 2nd Marine Division

Asian-Pacific Campaign World War II

The Battle for the Gilbert Islands

In Memory of Pfc. Floyd Everett Campbell

Killed in action during the amphibious

landing on Tarawa 20 November 1942

Purple Heart presented posthumous[ly]

Courtesy hmdb.org

Gold Star Mothers of America War Memorial

In memory of our sons and daughters who gave their lives in service to our country

Courtesy hmdb.org

Lebanon, Grenada, and Panama Veterans Memorial

In honor of Veterans

who served in

Lebanon and Grenada

August 24, 1981 - July 31, 1984

Panama

December 20, 1989 - January 31, 1990

Courtesy hmdb.org