762 
Telescopes, Mounting for the Specula 
of Reflecting, for Celestial Photo- 
graphy and Spectroscopy (Stoney), 
266. 
Telescopes, New Form of Equatorial 
Mounting for Monster Reflecting 
(GrusB), 252. 
Telescopes, Refracting and; Reflecting 
(GRruBB), 523. 
Tertiary Dykes in Donegal, Pitchstone 
and Andesite from (Soxuas), 87. 
Torres Straits, New Species of Acti- 
naria from (Happon and SHACKLE- 
Ton), 116. 
Torres Straits; Zoological Collections 
made in, by Professor A. C. Haddon, 
1888-1889 (CARPENTER), 21. 
Trouton (F. T.). Arrangement of the 
Crystals of certain Substances on 
Solidification, 691. 
Variolite and associated Igneous Rocks 
of Roundwood, County Wicklow 
(Sonzas), 94. 
Vartry Water, Notes on the (Moss), 
225. 
Vision, Limits of, with special Refer- 
ence to the Vision of Insects 
(Stonzy), 228. 
Water, Condition of the, in the Reser- 
voir at Roundwood (ADENEy), 208. 
Index. 
Water, Notes on the Vartry (Moss), 
226. 
Wicklow, Co., Gold Nuggets hitherto 
found in (Batt), 311. 
Wigham (J. R.). A Method of Using 
Common Petroleum as the Iluminant 
for Beacons and Buoys, by which a 
Continuous Light may be maintained, 
Day and Night, for Weeks or Months, 
without the necessity for the Attend- 
ance of a Light-keeper, 377. 
A Method of Increasing the Power 
of continuous Light-house Lights, 
347. 
A New Method of conferring dis- 
tinguishing characteristic Appear- 
ance upon Illuminated Buoys and 
Beacons for Harbours, Estuaries, 
and Rivers, 519. 
Wilson (W. E.). The apparent Come- 
tary Nature of the Spiral Nebula in 
Canes Venatici, 696. 
Work, Relation of the Theorem of, to 
the Theorem of Moments (Preston), 
167. 
Worm-tubes, Branched, and Acrozoan- 
thus (Happon), 344. 
X-Rays, Experiment to determine the 
exact Position in a Focus Tube from - 
which the X-Rays are emitted 
(Mottoy), 516. 
END OF VOL. VIII. 
