78 Miscellaneous Intelligence. 
Mr. Wilson’s views be not confirmed. The periods bes by 
Sir John Herschel and Admiral Smyth were 253 and 240 years, 
but Mr. Hind obtained in 1845 a period of 632 years, and 1 Captain 
Jacob, in 1846, a period of 653 years. The observations since 1845 
seem to r require a still further extension of the period, and may 
require us to accept Mr. Wilson’s remarkable conclusions. 
2. Meteorite of Ibbenbiihren, Westphalia; G. Rosr.—This 
meteorite fell on the 17th of June, 1870. It is ‘peculiar in consist- 
of si 
Rose remarks that one other meteorite, that of Manegaum, inves- 
tigated by Maskelyne, has essentially the same constitution (Si 
55°70, Fe 20°54, Mg 22°80, Ca,1°32—-100°36); while two others con- 
sist of a single mineral only, the Chassigny being made up of 
olivine alone, and the Bishopville of ens eae 
as Ibbenbihren mass is somewhat voidal, has a vise 
ooth exterior rind, showing ee of fision: The len 
nearly five inches (one- eighth of a r). 
Meteorites of India. er rene AK has described two Indian 
soedoiien One fell at Shergotty on the 25th of August, 1865, 
and eloeny regen blas those of beanie (1807). It consists of 
augite, a colorless tesseral silicate of the composition of labrador: 
rite which has been named maskelynite, and atte his is 
the first mention of the latter two at in a meteorite. The 
other we Sic yitie gee on Ma 1865. It peeve ‘of nickel- 
_iferous iron, ma ¢ pyrites, hiding chrysolite, bronzite, and 
a feldsparlike Tbebiiee —Akad, Wiss. Wien, Feb., 1872. 
TV. MISCELLANEOUS SCIENTIFIC INTELLIGENCE. 
1. Cause of the blue and violet chatoyant colors of Fishes.— 
G. Povucurr finds that there is a constant anatomic cause for the 
bluish uae violet rece color of some fis he es, There is under 
under the m roscope. Pouchet coneludes that the color is due to 
a sg of ach a —Acad. Sci., Paris, May, Les Mondes, 
Jun 
a ae in the blood.—BoussInGauLt finds the amount of metallic 
iron in aliments as follows: the minimum, in carots, 0°0009 gram} 
the maximum, in the blood of hogs, 0°0534 ; tS beer, 0040; in the 
wine of Beaujolais Chios The ration of a Fren ch sailor in the 
