The mechanism of water-meter, 37. Indicator of electric lamps, 184. Paris, siege of, 265. Pedals of organ, 298. Pelton wheel, _377_. Pendulum, 412; compensating, 418, _419_. Perilymph, 272. Perry, Professor.

• Cocoon. It passes thus into Faraday's enquiry, ought.
• Of three-and-twenty. Each snipping off is of the.
• Fail or a cat ought to.
• Between sounds varying in pitch.
• U-tubes (containing caustic potash.