1835.] Heat of Bodies to their Atomic Weights. 45 



We terminate for the present this interesting subject 

 by two observations. 



1 . The co-efficient of the law which marks the relation 

 between the specific heat and atomic weight, differs slightly 

 in different substances. It is in the 



Oxides ...... 1914 



Sulphurets .... -1871 



Sulphates -1932 



Carbonates . . . . '1892 



Mean 1902 



This mean is to 1875 nearly as 71 to 70. 



Neumann has found for sulphur the co-efficient '209, 

 which approaches -2085, the number of Lavoisier and 

 Laplace. Hence, it is probable that the co-efficient for non- 

 metallic substances may be a little greater than for metallic 

 bodies. 



2. We may likewise deduce from the researches of 

 Avogrado and Neumann that the atoms of bodies are related 

 according to a regular law, and that the accuracy of the 

 atomic numbers adopted in this country is confirmed in 

 many instances. 



Article VII. 

 Ascent of Chimhorazo, on the \Qth December 1831 . 



By M. BOUSSINGAULT.''^ 



After ten years of assiduous labour I had realized the pro- 

 jects of my youth, which had brought me to the new world. 

 The height of the barometer at the level of the sea between 

 the tropics, had been determined in the port of La Guayra. 

 The geographical position of the principle cities of Vene- 

 zuela and of New Grenada, had been already fixed. Nume- 

 rous observations, by levelling, had informed us of the figure 

 of the Cordilleras, and I had procured the most precise data 

 in reference to the position of the gold and platinum of 

 Antioquia and Choco. In short, my laboratory had been 

 successively erected in the different craters of the volcanoes 



* From the Annales de Chimie, Iviii. 150. 



