824 
Index . 
Johnston (Alexander Keith), Obituary 
Notice of, 535. 
Johnston (Keith), junior, on the Lake- 
Basins of Eastern Africa, 122. 
Kombi Arrow-Poison, 99. 
Laboratory Notes in Physical Science, 
206. 
On Thermo-Electricity, 308, 
390, 597. 
On Phyllotaxis, 391. 
On Anomalous Spectra and a 
simple Direct- Vision Spectroscope, 
410. 
On a simple Mode of explain- 
ing the Optical Effects of Mirrors 
and Lenses, 412. 
On a Method of illustrating to 
a large Audience the Composition 
of simple Harmonic Motion under 
various conditions, 412. 
On Thermo-Electricity (Cir- 
cuits with more than one Neutral 
Point), 773. 
On a Method of exhibiting 
the Sympathy of Pendulums, 779. 
Lake-Basins, Geological Structure of 
some Alpine, 33. 
of Eastern Africa, 122. 
Language, on the Place and Power of 
Accent in, 395. 
Languages, Primitive Affinity be- 
tween the Classical and the Low 
German, 167. 
Laycock (Thomas, M.D.), Facts as to 
Brain-Work, 145. 
Lead, Action of Water on, 699. 
Leitch (W.), a simple Method of 
Approximating to the Wave-Length 
of Light, 179. 
Le Sage, Ultramundane Corpuscules, 
577. 
Library, Donations to, 209, 514, 796. 
Lichens, Experiments on the Colorific 
Properties of, 43. 
Light, a simple Method of Approxi- 
mating to the Wave-Length of, 
179. 
Lindsay (Lauder, M.D.), Experiments 
on the Colorific Properties of 
Lichens, 43. 
(Thomas M.), on the use of 
the Scholastic Terms Vetus logica 
and Nova logica , with a Remark 
upon the corresponding Terms 
Antiqui and Moderni, 441. 
Lines of the Fourth Order, a singular 
case of Rectification in, 613. 
Lochs, Deep-Water, Temperature of, 
791. 
Logarithmic Tables, Account of the 
Extension of the Seven-Place, from 
100,000 to 200,000, 395. 
Macdonald (Professor) on the Homo- 
logies of the Vertebral Skeleton in 
the Osseous Fishes and Man, 472. 
MTntosh (W. C.) M.D., on the Re- 
markable Annelida of the Channel 
Islands, 438. 
on the Structure of Tubifex, 
166. 
Magnetism, Relation of, to Tempera- 
ture, 603. 
Maitland (Francis Edward), Obituary 
Notice of, 242. 
Marshall (D. H.) on the Relation of 
Magnetism to Temperature, 603. 
Martius (Charles Frederick Philip 
von), Obituary Notice of, 20. 
Mathematical Notes. On a Quater- 
nion Integration, 434. 
— On the Ovals of Descartes, 436. 
On a Property of Self-Conju- 
gate Linear Vector Functions, 498. 
Relation between Correspond- 
ing Ordinates of Two Parabolas, 
499. 
On some Quaternion Transfor- 
mations, 501. 
On an Expression for the 
Potential of a Surface Distribution, 
&c., 503. 
Matrix of the Third Order, on the 
Extraction of the Square Root of, 
675. 
Maxwell (J. Clerk) on Reciprocal 
Figures, Frames, and Diagrams of 
Forces, 53. 
on a Bow seen on the Surface 
of Ice, 69. 
on Geometric Mean Distance, 
613. 
Meikle (James) on the Rate of Mor- 
tality of Assured Lives, 115. 
Mesoplodon Sowerbyi, 760. 
Milne-Home (D.), Opening Address, 
Session 1870-71, 232. 
Scheme for the Conservation 
of Remarkable Boulders in Scot- 
land, and for the Indication of their 
Positions on Maps, 475. 
Notice of a Large Boulder in 
the Parish of Rattray, and County 
of Perth, having on one of its 
Sides Cups and Grooves, apparently 
artificial, 682. 
