732 INDEX. 
third must become that the strain may be 
pure, 680. To find the surface bounding the 
region which is filled with the feet of perpen- 
diculars on central axes, 683. 
Tale-chlorite, Analysis of, 78. 
Talc-slute of the Highlands, 11. 
Telephone. See Curystat (Professor). 
Temperature Variations. Their Physiological Re- 
sults. By Joun Berry Hayorart, F.R.S.E., 
119. Number of Conceptions and Temperature 
attain a Maximum in July, 121. Elevation of 
1° Fahrenheit causes Increase of Conceptions of 
about *5 per cent., 123. Capacity of Conceiv- 
ing depends on Temperature, 128. Tempera- 
ture and Conception Numbers by Fourier’s 
Harmonic Analysis, 131. 
Therapeutical Research, Methods of, 134. 
Thermometers. Notice of the Completion of the 
New Rock Thermometers at the Royal Obser- 
vatory, Edinburgh, and what they are for. 
By Professor Prazzi Suytu, F.R.S.E., Astro- 
nomer-Royal for Scotland, 637. 
Thermometry. Researches in Thermometry, 567. 
See Minis (Epmunp J.), D.Sc. F.R.S. 
Traquair (Ramsay H.), F.R.S.E. On the Struc- 
ture and Affinities of the Platysomide, 343. 
See Platysomide. 
True Veins of Minerals, 3. 
U 
Uropteryx. A genus of the Platysomid, 368. 
Vv 
Variation with Tenperature of the Electrical Resist- 
ance of Wires of certain Alloys. By Professor 
J. G. MacGreucor, D.Sc., F.R.S.E., and C. G. 
Kwort, D.Sc., F.R.S.E., 599. 
Variegation and Cell-Multiplication in a Species of 
Enteromorpha. By P. Geppgs, F.R.S.E., 555. 
Volcanic Districts of the Basin of the Firth of 
Forth, 445. Structure of the Volcanic Masses, 
455. 
Ww 
Wardichthys. A genus of the Platysomide, 361. 
Watson (Morrison), M.D., F.R.S.E., and Youne 
(Atrrep H.), M.B. On the Anatomy of the 
Northern Beluga (Delphinapterus leucas) com- 
pared with that of other Whales, 393. 
Y 
Youne (Aurrep H.), M.B., and Watson (Morrt- 
son), M.D., F.R.S.E. On the Anatomy of the 
Northern Beluga compared with that of other 
Whales, 393. 
Aw low 7 P 
2/012 FT, 
EE ————— Re —_— 
