Part 41

Moore, Dr. McFarlan, 146, 147

Morality, effect of light upon, 9

Morse code: application of, to light-signaling, 198, 199

Moses, 195

Moving-pictures, 9, 260, 261

Munich, 72

Murdock, William: installment of gas-pipes by, 63; 68, 69, 70; quoted on industrial use of artificial, 71; 72, 73, 74, 76, 78, 217, 309

Museums: 13; utilization of artificial light by, 322, 323

Music: light as an accompaniment to, 352-354

Mythology, 16

Nantes, 85

Napoleon, 111

Napthalene, 106

National Heat and Light Co., 72, 74

Natural gas, 99

Navesink Light, 206

Nernst, 138, 139

Newspapers, 8

Newton, Sir Isaac: 7; quoted on discovery of visible spectrum, 87; 88

New York, 98, 165, 166, 206, 302, 304

Niagara Falls, 108, 306

Nickel, 262

Nielson, 77

Niepce, 258

Niter, 21

Nitrogen, 137

Norfolk, 169

Obesity, 275