Index. 
Ill 
Tait (Professor) on the Measure of 
Beknottedness, 289. 
on Knots, 306. 
on Links, 321. 
on Sevenfold Knottiness, 363. 
on a New Method of Investi- 
gating the Properties of Knots, 403. 
Additional Remarks on Knots, 
405. 
on a Possible Influence of 
Magnetism on the Absorption of 
Light, 118. 
on the Origin of Thunder- 
storms, 136. 
on some Recent Atmospheric 
Phenomena (5th June 1876), 170, 
425. 
on the Relative Percentages 
of the Atmosphere and of the Ocean 
which would Flow into a Rent in 
the Earth’s Surface, 333. 
Note on a White Sunbow, 544. 
Note on the Thermo-Electric 
Position of Cobalt, 138. 
on Effect of Heat on Infusible 
Impalpable Powders, 298. 
on Some Effects of Heat on 
Electrostatic Attraction, 302. 
on Thermal Conductivity, 581. 
Note on Electrolytic Conduc- 
tion, 614. 
Note on Thermal Conduction, 
615. 
on the Electric Conductivity 
of the Bars Employed in his 
Measurements of Thermal Con- 
ductivity, 718. 
on the Strength of the Cur- 
rents Required to Work a Tele- 
phone, 535, 551. 
exhibits a Double Mouth- 
piece, by means of which Two 
Players can Produce Chords from a 
French Horn, 536. 
on Certain Effects of Periodic 
Variation of Intensity of a Musical 
Note, 736. 
Note on a Mode of Producing 
Sounds of very great Intensity, 737. 
Telephone. — On the Strength of the 
Currents required to work a Tele- 
phone, by Professor Tait, 535, 551. 
Mr Blyth substitutes Copper- 
plate, Wood, India-rubber, &c., for 
the Iron Disk of Receiving Tele- 
phone, 535. 
— — Experiments with the Tele- 
phone, by James Blyth, 653. 
Telephone. — An Account of Some Ex- 
periments on the Telephone and 
Microphone, by James Blyth, 711. 
On the Theory of the Tele- 
phone, by Prof. George Forbes, 555. 
Some Experiments with the 
Telephone, by Professor John G. 
M‘Kendrick, 558. 
— Indications of Molecular 
Action in the Telephone, by Dr R. 
M. Ferguson, 615. 
On the Splitting up of Electric 
Currents, as detected by the Tele- 
phone, and the Founding thereon of 
a Sounder to call attention from one 
Telephone to another, by R. H. Bow, 
C.E., 707. 
Tennent (Robert), Why the Baro- 
meter does not always indicate real 
Vertical Pressure, 412. 
on Progressive Movement of 
Barometric Depressions or Storms, 
570. 
Thermal Conductivity of Gas Coke, 
by Messrs Knott and Macfarlane, 
333. 
Thermal Conduction, by Prof.Tait, 615. 
Thermal Conductivity, Measurements 
of, by Professor Tait, 581, 718. 
Thermo-Dynamic Motivity, by Sir 
William Thomson, 144. 
Thomson (Sir C. Wyville) on the 
Structure and Relations of the 
genus Holopus, 405. 
His Address on delivering the 
Neil Prize to Dr Traquair, 549. 
Thomson (James, F.G.S.) on New 
Forms of Palaeozoic Corals, 149. 
Thomson (James, C.E.), Notice of 
death of, 488. 
Thomson (Professor James), Applica- 
tion of his Integrator to Harmonic 
Analyses of Meteorological, Tidal, 
and other Phenomena, and to the 
Integration of Differential Equa- 
tions, by Sir Wm. Thomson, 138. 
Thomson (Sir William) on Vortex 
Statics, 59. 
— on Two-Dimensional Motion 
of Mutually Influencing Vortex 
Columns, and on Two-Dimensional 
Approximately Circular Motion of 
a Liquid, 98. 
on Vortex Theory of Gases, 
Condensation of Gases, and the 
Continuity between the Gaseous 
and Liquid State, 144. 
— on Vortex Vibrations, and 
