measure, 181.

Lines, 95, 99, 110.

Lines, section, 84.

Linseed, 162.

Linseed oil, 149, 174,175.

Liquid measure, 182.

Liquids, 84.

Litharge, 163.

Long measure, 181.

Lubricant, 171.

Luminous, 91.

Lycopodium, 169.

M

Machine, 26.

Magnesium, 166.

Magnesium sulphate, 169.

Magnet, 153.

Magnetism, 93.

Major axis, 105.

Malleability, 81.

Malleable, 112.

Mandrel, 66, 76.

Manganese, 163.

Marble, 162.

Mass, 85.

Mastic, 169.

Measure, 139, 140, 143, 151.

Measure, liquid, 182.

Measure, long, 181.

Measurement, 145.

Measure, paper, 182.

Measure, solid, 82.

Measure, square, 181.

Membrane, 90.

Mercuric chloride, 166.

Mercury, 94, 114, 183.

Meridian, 145.

Metric, 144, 145, 146.

Metrical, 145.

Micron, 146.

Microscope, 91.

Millimeter, 146.

Milling machine, 26.

Minor, 164.

Minor axis, 105, 106.

Miter, 146.

Miter gear, 123, 124, 125, 126.

Molecular, 82, 117.

Molecular forces, 82.

Molecules, 83, 84, 146.

Momentum, 83, 85.

Motion, 84, 156.

Motor, 136, 155.

N

Neat's Foot oil, 168.

Neroli, 168.

Nickel, 164.

Nitrate of copper, 174.

Nitrate of potash, 167.

Nitrate of silver, 174.

Nitric acid, 162, 168, 169, 171, 173.

Nitro-glycerine, 167, 185.

O

Oath, 193.

Octave, 159.

Odophone, 159.

Odor, 159.

Oil, 83, 87, 167, 171.

Oil eradicator, 166.

Oleonaptha, 171.

Oscillations, 90, 157.

Ounce, 180.

Outlines, 99.

Oxalic acid, 172.

Oxidation, 117.

Oxide, 117, 163.

Oxidizing, 116.

Oxygen, 83, 119.

P

Palm oil, 171.

Paper, 168, 171.

Paraffine, 168, 171.

Parallel, 91, 100, 121.

Paris blue, 172.

Paste, 163, 173.

Patents, 188, 189, 190, 192, 194.

Pawl, 73, 76.

Pendulum, 73.

Parting tools, 28.

Perimeter, 73.

Periphery, 73.

Permanganate of potash, 178.

Perpendicular, 105.

Perpetual motion, 128.

Perspective, 97, 106, 107.

Petroleum, 168.

Phenomenon, 91, 153.

Phonautograph, 90.

Phonograph,-91, 154.

Phosphorus, 149.

Photographer, 157, 172.

Piano, 158, 159.

Pinion, 57, 74.

Pitch, 121, 125, 156.

Pitch, circle, 122, 124, 125.

Pitch, diameter, 123, 124.

Pitch, line, 123, 124, 127.

Pitman, 70.

Pivots, 70, 130.

Planer, 26, 50, 51, 126.

Plaster, 173.

Plaster of Paris, 150, 174.

Plate, 73.

Plates, 50.

Plating, 173.

Platinum, 81.

Plumbago, 173.

Poles, 155.

Polishe