No. 4. [From Xatnte, June n, 1885, Vol. xxxil. pp. 126-130.] 



RELATION BETWEEN THE TEMPERATURE 

 OF THE SEA AND THAT OF THE AIR 

 ABOVE IT 



BEING obliged to proceed to South America at the beginning 

 of the year 1885, I took with me a thermometer and a hydro- 

 meter in order, if circumstances were favourable, to provide 

 myself with occupation during the somewhat long and mono- 

 tonous voyage. Thanks to the kindness and courtesy of Captain 

 Brown, of the s.s. "Leibnitz," who took a lively interest, and 

 assisted me greatly in carrying out my observations, the voyage 

 was neither long nor tedious. 



The "Leibnitz" sailed from Southampton on January 16, 

 1885, and made the passage direct, without touching at inter- 

 mediate ports, to Monte Video, where she arrived on February 8, 

 : a very favourable voyage. The route lay through the 

 most interesting meteorological districts of the Atlantic, and 

 my principal object at starting was to make as many observa- 

 tions of the temperature and the density of the surface-v. 

 L, r the route as possible. With these I combined observa- 

 the temperature of the air, and frequently also of 

 the wet-bulb thermometer. Observations were begun on 

 January 21 in lat. 34 N., and continued up to the morning 



rival in tin- River Plate. 



I have put together the simultaneous observations of the 

 temperature of the air and the water with those of the wet- 

 bulb thermometer, as they possess some interest of their 

 the observations of density are kept for a future oppor- 

 tunity. U the redu< ti<>n> in ennneetimi \\ith them are not quite 

 ued. 

 The thermometer used for all the observations was divided 



legrees of the Oi d was ol 



ordinary form of German manufacture, with a paper scale. 



B. in. 8 



