The Public Utilities ClipArt gallery provides 154 illustrations of public water, gas, electrical, and related systems.

Low-head, vertical water wheel generator station.

Generator

Low-head, vertical water wheel generator station.

A low-head, horizontal-turbo-generator-unit installation.

Generator Installation

A low-head, horizontal-turbo-generator-unit installation.

Section C-C. Through generator platform.

Generator Platform

Section C-C. Through generator platform.

Maximum section, Gilboa dam.

Gilboa Dam

Maximum section, Gilboa dam.

Graphic record produced by General Electric Company's Type G demand meter.

Graphic Record

Graphic record produced by General Electric Company's Type G demand meter.

A ground wire over a three-phase transmission circuit.

Ground Wire

A ground wire over a three-phase transmission circuit.

A graphic definition of the term "head".

Head

A graphic definition of the term "head".

Boring holes around a bridge.

Hole

Boring holes around a bridge.

A horn-gap protector for air conditioner series lightning circuits.

Horn-gap Protector

A horn-gap protector for air conditioner series lightning circuits.

Salt lick hydraulic-fill dam, Pennsylvania.

Hydraulic-fill Dam

Salt lick hydraulic-fill dam, Pennsylvania.

Illustrating the nomenclature of the essential elements of a hydro-electric development.

Hydro-electric Development

Illustrating the nomenclature of the essential elements of a hydro-electric development.

Sectional elevation of a typical 110,000 volt hydro-electric generating station.

Hydro-electric Station

Sectional elevation of a typical 110,000 volt hydro-electric generating station.

Impulse wheel and nozzle.

Impulse Wheel

Impulse wheel and nozzle.

A cross-section of the Edison Electric Company's hydro-electric station at Kern River, California, containing four 10,750 h.p. Allis-Chalmers impulse wheels.

Impulse Wheels

A cross-section of the Edison Electric Company's hydro-electric station at Kern River, California, containing…

Determination of an average load imposed by an industrial plant.

Industrial Plant

Determination of an average load imposed by an industrial plant.

End elevation of the control desk and instrument board.

Instrument Board

End elevation of the control desk and instrument board.

Instrument post used instead of a panel switchboard.

Instrument Post

Instrument post used instead of a panel switchboard.

A General Electric "hour glass" choke coil insulated for 35,000 volts.

Insulated Choke Coil

A General Electric "hour glass" choke coil insulated for 35,000 volts.

Sectional view of Kensico dam.

Kensico Dam

Sectional view of Kensico dam.

Sectional elevation of the Keokuk hydro-electric station.

Keokuk

Sectional elevation of the Keokuk hydro-electric station.

Knopp test set for determining current in direct-current conductors.

Knopp Test

Knopp test set for determining current in direct-current conductors.

Installation of Kuhlo wire in a residence.

Kuhlo Wire

Installation of Kuhlo wire in a residence.

Incandescent lamps for exploring.

Lamps

Incandescent lamps for exploring.

Fixtures used in a Boston house wiring campaign.  (Listed at consumer price).  Fixtures sold in finished-building wiring campaign by the Union Electric Light & Power Company of St. Louis, Missouri.

Light Fixtures

Fixtures used in a Boston house wiring campaign. (Listed at consumer price). Fixtures sold in finished-building…

Illustrating the principle of the magnetic blow-out lightning protector.

Lightning Protector

Illustrating the principle of the magnetic blow-out lightning protector.

A Pierce line wire, horn-gap protector.

Line Wire

A Pierce line wire, horn-gap protector.

A magnetic locator.

Magnetic Locator

A magnetic locator.

Overall type of masonry dam.

Masonry Dam

Overall type of masonry dam.

Installation of metal molding to serve brackets.

Metal Molding

Installation of metal molding to serve brackets.

A method of mounting a box for a bracket fixture.

Mounting Box

A method of mounting a box for a bracket fixture.

A multigap protector mounted on a pole for transformer protection.

Multigap Protector

A multigap protector mounted on a pole for transformer protection.

A multipath protector in a wooden box for outdoor installation.

Multipath Protector

A multipath protector in a wooden box for outdoor installation.

Assuan on the Nile in Egypt.

Nile River

Assuan on the Nile in Egypt.

Section through a small, low pressure oil engine of the "hot-bulb" or "hot-ball" type.

Oil Engine

Section through a small, low pressure oil engine of the "hot-bulb" or "hot-ball" type.

Remote control oil switch in masonry-cell mounting.

Oil Switch

Remote control oil switch in masonry-cell mounting.

The circulating oil-type transformer.

Oil-type Transformer

The circulating oil-type transformer.

Supporting outlet box on a furred ceiling.

Outlet Box

Supporting outlet box on a furred ceiling.

Gatun dam - Panama canal.

Panama Canal

Gatun dam - Panama canal.

A panel box in a rigid conduit installation.

Panel Box

A panel box in a rigid conduit installation.

Examining a partition interior.

Partition

Examining a partition interior.

Finding the average load from a load graph with a planimeter

Planimeter

Finding the average load from a load graph with a planimeter

An Amsler-type polar planimeter that is being used to measure the area of a load graph.

Polar Planimeter

An Amsler-type polar planimeter that is being used to measure the area of a load graph.

An illustration showing the distribution losses in a small, alternating current central station.

Power Lines

An illustration showing the distribution losses in a small, alternating current central station.

A printometer-type demand meter arranged in a self-contained case for field tests.

Printometer

A printometer-type demand meter arranged in a self-contained case for field tests.

Schematic connection diagram for a grounded-neutral, three-phase electrolytic protector.

Protector

Schematic connection diagram for a grounded-neutral, three-phase electrolytic protector.

Outdoor-type, cupped-disc-gap protectors on a three-phase line.

Protectors

Outdoor-type, cupped-disc-gap protectors on a three-phase line.

Ratchet drills.

Ratchet Drills

Ratchet drills.

Illustrating the principle of the reaction wheel. (Shows a cylinder-gate, horizontal-type turbine mounted in a steel flume.)

Reaction Wheel

Illustrating the principle of the reaction wheel. (Shows a cylinder-gate, horizontal-type turbine mounted…

A current-limiting reactor.

Reactor

A current-limiting reactor.

Rear elevation of the switchboard with the perspective and front views.

Rear Elevation of Switchboard

Rear elevation of the switchboard with the perspective and front views.

A regulator for small, direct-current generators.

Regulator

A regulator for small, direct-current generators.

Rigid conduit inserted where the conduit is exposed to moisture.

Rigid Conduit

Rigid conduit inserted where the conduit is exposed to moisture.

Manipulation of the special flooring saw. (Finishing the cut).

Saw

Manipulation of the special flooring saw. (Finishing the cut).

Sectional elevation showing construction of the Ames-Stumph uniflow engine.

Sectional Elevation

Sectional elevation showing construction of the Ames-Stumph uniflow engine.

Rock fill and earth dam.

Sectional View of Dam

Rock fill and earth dam.

Oil-cooled or self-cooling transformer. (Tubular type)

Self Cooling Transformer

Oil-cooled or self-cooling transformer. (Tubular type)

Method of setting a planimeter so that it reads the mean height of a graph.

Setting Planimeter

Method of setting a planimeter so that it reads the mean height of a graph.

A sheet-metal panel box.

Sheet-metal Panel Box

A sheet-metal panel box.

Shoshone dam.

Shoshone Dam

Shoshone dam.

Size wire for motor line.

Size Wire

Size wire for motor line.