THE British Tibet expedition, which has required the existence of troops at altitudes of from 10,000 to 15,700 feet above sea-level, has furnished a number of instances of the effect of a high elevation on life and habits. There has been considerable mountain sickness among the men, who are quite unused to such altitudes, and also a large amount of indigestion due to the undercooked food. At elevations of about 15,000 feet water boils at about 108 degrees Fahrenheit and, consequently, the ordinary amount of cooking is quite inadequate. At such a height it is almost impossible to boil rice properly, while of the several kinds of dal or ordinary red lentil of India, there is only one variety that can be cooked at heights over 10,000 feet. For such elevations there should have been provided cooking vessels with air-tight lids, provided with safety valves which would blow off at a pressure of fifteen pounds to the square inch, or approximately that of the atmosphere at sea-level. Another effect of the latitude and temperature was the difficulty in the operations of the magazines of the rifles and the mechanism of the Maxim gun on account of the congealing of the oil, which lost its lubricating properties. This could have been remedied by supplying glycerine for lubricating purposes. As automatic guns depend largely upon spring, it was also observed in this connection that their elasticity is effected by the temperature, and that such weapons should be tested for any condition of temperature they are likely to meet.—Harper's Weekly.