Position for dynamo--Dynamo to be kept clean and cool--Quick-speed
engines--Slow-speed engines with belts--Means of keeping belt on
the pulley--Engine must work steadily--A good sensitive governor
wanted--The belt must be kept tight--A handy belt-stretcher--
Friction gearing--Switch board near dynamo--Leads of different
colours--Main leads and branch leads--Lamps held in frosted
globes--Switches for each lamp--Lamps of various candle-powers--
Plan for lighting quarter-deck at times--Arrangement of
temporary leads--Leads and lamps always ready, and easily fixed
up--Lighting of ships' holds--Danger of fire with oil lamps--Arc
lamps not suitable--Arrangement of leads for incandescent lamps--
Work carried on better, and pilfering of cargo prevented--Hold
leads disconnected while at sea--Installation complete--Lights
wanted as night approaches--Precautions before starting dynamo--
Lubrication must be perfect--Commutators and collectors require
very little oil--Position of brushes--Start the engine--Switches
not turned on; no current except from exciter--Testing work
of exciter--Dynamos very powerful magnets--Look out for your
watches--Switch on the lamps--Current is produced in large dynamo--
Difference of a few lamps compensated by governor--Turn all
lamps on, and light up gradually--Inequality of light in different
lamps--Weeding out of bad lamps--Lamps not to be run too bright--
No trouble with dynamo if oiling is attended to--Seizing--Oil
must be thin--The dynamo must be kept clean--Little troubles with
the lamps--No safety fuse--Effects of vibration of ship on lamps--
What to look to if a lamp is out.--Recapitulation--A current of
50 volts is hardly felt--Incandescent lights for side lights--
Mast-head light--Arc light should never be used--Present mast-head
light quite powerful enough--On passenger steamers, side one
blaze of light, and side lights barely visible--Speed of dynamo
constant, but steam power used in proportion to number of lamps
in use--No danger to life from electric current on board ship--
Binnacle lamps. Electric light not suitable--Dynamo if near a
compass will affect it--Notes 27