Vitality of the Salmonide. 109 
All these ethers are alike in their acrid taste, the white fumes which 
they emit, and which contain some boracie acid, the accompanying com- 
pounds, and finally in their property of coloring dry tumerie brown, a 
property belonging also to dry chlorhydrie gas. 
These new compounds act with MnO2 like ether charged with CIH; 
that is to say, it transforms it into MnCl? or MnBr?; the sesquioxyds are 
equally attacked by it. 
ence, Marseilles, Madrid, or in Algiers. ar, however, a birth of 
ostriches has taken place in the cooler region of Grenoble, in the garden 
of acclimatization of the Regional Society of the Alps 
The ostriches at the time of breeding were kept in a chamber. After 
46 days two young ones appeared, to which the female seemed as devoted 
as she had been indifferent to the eggs, On this occasion, as has been 
before observed, the little ones placed themselves only under the male, 
and received no nourishment from the parents. 
After the results obtained in Spain, and since in England, we may hope 
#80 to acclimatize the Cassowary. 
fresh waters of Australia, and simply by retarding the hatching by keep- 
ing them in ice. We have already spoken of these attempts. The So- 
ciety of Acclimatization at Paris learn from Mr. Ed. Wilson, President of 
the Society of Acclimatization of Victoria (Australia), that the young fis 
hatched in 1864 have done wonderfully well, and encourage the beli 
that their acclimatization and reproduction are assured facts. 
12. Vitality of the Salmonide.—On this occasion, we may recall the 
results of some experiments that Mr. Millet has undertaken on the circu- 
lation in young Salmonide, such as the European Salmon, Trout, Grey- 
ling (Thymallus), and Coregonus. The result is very important to prac- 
tical pisciculture, : 
_ In the earlier state, the vitality of the Salmonide has as its inferior 
limit ~2° C, and as the higher +30° C. With trout, and with the 
Salmonide in eneral, the necessities 0 iration increase with the 
temperature. Water in which the fish live should be much more aérated, 
oF more frequently renewed, when the temperature is above +-15° C. than 
en it remains below --10° C. a ae 
_ +he transportation sd taabeyonts eggs and of young Salmonidz re- 
quires much less air, or less water, at a low temperature, than at a hi 
