Untitled

102 INDEX. INDEX. 103
Compressed gases, pressure-gauges
for, 27, 32
Compressed gases, regulators for,
26, 32
Condenser, 61
31
function of the, 3, 60
Gravett's, 62
Herschel's, 62
triple, 62
Contents of a cylinder, to ascer
tam, 29
County Council regulations, 72
Crystallisation, to show, 89
Crystal oil for lanterns, 8
Curtain slides, 80
Cut-off, Pringle's, 42
Cylinders, 25
f f
ft
ff
the annealing of, 26
to ascertain the contents
of, 29
care of, 31
carriage of by rail, 33
keys for, 30
nipples for, 32
to test for leakage, 31
Decomposition, to show, 90
Development, photographic, to
show, 84
Disc, size of, and light to be
employed, 3, 4, 66
Disc of lime, 15
Newton's, 94
Dissolver for oil lamps, 54
Double pressure boards, 19
Drummond, invention of limelight
by, 11
Eclipse carrier, 56
Effects, 78
Electric light, arc lamps, 46
connections for arc
lamps, 49
incandescent lamp,
44, 45
wires for, 50
Erecting prism, 86
Ether saturators, 35
Experiments with the lantern,
83
Fine adjustment valve, 30
Fluorescence, to show, 93
Focal length of objectives, 64
Four-wick lamps, 7
Framed slides, 55
Front, the lantern, 54
Function of the condenser, 3
Galvanometer, the lantern, 85
Gas bags, 18
to charge, 23
f f pressure boards for, 19
coal used alone in lanterns, 36
tf compressed, 25
holders, 18, 20
incandescent, 37
preparation of oxygen, 21
tf Welsbach system, 37
Hard limes, 15
Holders, pneumatic, 20
Home-made oxygen, 18
Illuminants, 2, 4
Incandescent gas lamps, 37
t3 electric lamps for
the lantern, 44
Invention of the limelight, 11
of the Sciopticon, 6
Iron carbonyl, 33
tubing, 33
Jets, 11
blow-through or safety, 39
mixed, 41
oxy-calcium, 38
Keys for cylinders, 30
Lacing up lantern screens, 69
Lamp holders, incandescent, 45
Lamp, arc, 46
Argand, 5
carbons for electric, 49
f colza, 5
dissolver for oil, 54
71
incandescent, for the
lantern, 44
oil, 5
resistances for arc, 49
Lamp, the " Scissors " arc, 47
sperm, 5
three and four-wick, 7
wires for electric, 50
Lantern, biunial, 53
the choice of a, 2, 4
galvanometer, 85
the Matthew's, 58
microscope, 97
parts of, 2
polariscope, 95
spectroscope, 91
triunial, 53
Leakage of cylinders, to test
for, 31
Lever slides, 79
Light, the proper adjustment of,
74
Limelight invented by Drummond,
11
Lime, adjustment of, 40
blackening of the, 33
the care of, 16
discs, 15
hard and soft, 15
the Newtonian, 16
the Nottingham, 15
pitting of the, 41
shield, 17
substitutes for, 17
Manganese and chlorate cakes, 22
Marcy, inventor of the Sciopticon,
6
Marking or spotting of slides,
54, 75
Matthew's lantern, 58
Mechanical tray for jets, 13
Microscopic projection, 97
Midland Railway, regulations re
cylinders, 33
Mixed jets, 13, 41
Moonlight effects, 81
Mounted slides, 54
Moving slides, 78
Newtonian lime, 16
Newton's disc, 94
Nipples for cylinders, 32
Nottingham limes, 15
Objectives, 3, 63
calculations of, 65
f
the care of, 66
f f focal length of, 64
f PetzvaPs, 63
Oil lamps, 5
adjustment of chimney,
9
dissolver for, 54
Opaque objects, arrangement for
showing, 87
Optical system, 4, 60
Optinms three-wick lamps, 7
Oxy-calcium jets, 12, 38
Oxygen, home-made, 18
preparation of, 21
retorts, 21
washing, 23
Packing cylinders, 33
Panoramic slides, 79
Paraffin or crystal oil, 8
Petroleum for lantern work, 8
Photographic development, to
show, 84
Pitting of the lime, 41
Pneumatic holders, 20
Polariscope for the lantern, 95
Polarisation experiments, 95
Potassium chlorate, 22
Power of various illuminants,
2, 4
Preparation of oxygen, 21
Pressure boards, 19
Pressure gauges, 27, 32
Pringle's cut-off, 42
Prism for erecting, 86
Projections, vertical, 88
Protection of limes from the
air, 16
Railway regulations for carriage
of cylinders, 33
Rain effects, 80
Regulations by the County
Council, 72
Regulators, 26, 32
Retort for oxygen making, 21
Revolving slides, 80
Rubber tubing, 32