a brilliant circular glory or rainbow.* [Probably caused by spiculae of ice floating in the atmosphere, the lateral surfaces of which would then have an uniform inclination of 60 degrees: this, according to the observations of Mariotte, Venturi, and Fraunhoefer being the angle necessary for the formation of halos.] The temperature of the Donkia pass is much higher than might be anticipated from its great elevation, and from the fact of its being always bitterly cold to the feelings. This is no doubt due to the warmth of the ascending currents, and to the heat evolved during the condensation of their vapours. I took the following observations:-- Sept. 9, 1.30-3.30 p.m.: Temp. 41.8 degrees, D.P. 30.3 degrees, Difference 11.5 degrees, Tension 0.1876, Humidity 0.665. Sept. 27 1.15-3.15 p.m.: Temp. 49.2 degrees, D.P. 32.6 degrees, Difference 16.6 degrees, Tension 0.2037, Humidity 0.560. Oct. 19, 3.00-3.30 p.m.: Temp. 40.1 degrees, D.P. 25.0 degrees, Difference 15.1 degrees, Tension 0.1551, Humidity 0.585. The first and last of these temperatures were respectively 42.3 degrees and 46.4 degrees lower than Calcutta, which, with the proper deduction for latitude, allows 508 and 460 feet as equivalent to 1 degree Fahr. I left a minimum thermometer on the summit on the 9th of September, and removed it on the 27th, but it had been lifted and turned over by the action of the frost and snow on the loose rocks amongst which I had placed it; the latter appearing to have been completely shifted. Fortunately, the instrument escaped unhurt, with the index at 28 degrees. A violent southerly wind, with a scud of mist, and sometimes snow, always blew over the pass: but we found shelter on the north face, where I twice kindled a fire, and boiled my thermometers.* [On the 9th of September the boiling-point was 181.3 degrees, and on the 27th, 181.2 degrees. In both observations, I believe the kettle communicated a higher temperature to the thermometer than that of the water, for the elevations deduced are far too low.] On one occasion I felt the pulses of my party several times during two hours' repose (without eating); the mean of eight persons was 105 degrees, the extremes being 92 degrees and 120 degrees, and my own 108 degrees.