186 Scientifie Intelligence. 



Babington, from whose paper on the subject we have taken these particu- 

 lars, piney tallow consists of 



Carbon 77-0 10 atoms 



Hydrogen 12.3 9 



Oxygen 10.7 1 



100.0 

 Mr Babington remarks that 500 cwt. of piney tallow, may be obtained 

 in the town of Mangalore, for 50 rupees, which is about 2Jd per pound. 

 Quarterly Journal, No. 38, p. 177. 



III. NATURAL HISTORT. 



MINERALOGY. 



42. New Analysis of Dioptase, — The former analyses of Vauquelin and 

 Lowitz, differ widely from the following results now obtained by Vauque- 

 lin. 



100 100.00 100.000 



Vauquelin's second analysis was made up by decigrammes. 



43. Mr Swtdenstie?-na's Collection of Minerals. This valuable collection 

 of minerals has been purchased by the Prince Royal of Sweden, who has 

 presented it to the university of Upsal, of which he is the head. 



44. Remarkable Law in Mineralogy. M. A. F. Kuffner, of the Univer- 

 sity of Casan, has discovered a very remarkable relation between the 

 weight of the atoms of minerals, the volumes of their primitive forms, 

 and of their specific gravities. This law is represented by the equation 



—=^-^,10, w' being the weights of the atoms of two different sub- 

 v v' 



stances, s, J their specific gravities, and v, v' the volumes of their 

 primitive forms, the semi-axis being supposed equal to unity. In 

 order to compare the specific gravities of minerals deduced from this 

 law, with the observed specific gravities, we obtain from the above equa- 

 tion the formula i'=—y-,, so that, by having the values of s, w and v 

 v w' 



for one substance, such as calcareous spar, and the values of v' and tv' for 

 another substance belonging to the same system of crystallization, such as 

 quartz, we shall obtain s' as the specific gravity of quartz. In the system 

 of octohedrons with a rhombic base, M. Kupffner chose the one of the three 

 Perpendicular axes which gives a result most conformable with his law. 



