A10 Scientific Intelligence. 
Pisciculture.—The government of the Pays-Bas has instituted a com- 
mission for establishing in Holland some Piscines after Millet’s system. 
A Piscine will be installed in the palace of the Voos in Guelder, another 
in the palace (“du bois”) at the Hague. The commission will publish 
also a manual containing all the theoretical and practical data to insure 
good management and successful operations. The preparation of this 
manual is already far advanced. 
Prizes Proposed.—The Société a of which M. Du- 
mas is Bate proposes to issue the following pr 
: of 3000 fr. to cont ~~ of the best eile on oh the nature of 
the disedne mes attacks the v 
2. A prize of 3000 fr. to a leveutir of the effectual method of 
preventing or destroying the disease of the vin 
3. Three prizes of 1000 fr. each, and six of 500 fr. each, in favor of 
authors of the best works on the following subjects 
(1.) Origin and progress of the wrearet the work to be accompanied 
by charts illustrating the annual progr 
(2.) Discovery of a method of seeing at will the Oidium or of in- 
noculating it. 
(3.) Discovery of the conditions of hybernation peculiar to the Oidium. 
(4.) An exact history, accompanied with authentic proofs of the effects 
obtained from the use of different manures, and especially the is do te 
5.) Variations in the disease due to climates, nid. gare soils, an 
meteorological circumstances. 
(6.) Historical account, accompanied with authentic documents, of 
the effects, positive or negative, obtained from the different remedies 
proposed and hitherto employe 
esearch on the effects produced on the vine towards removing 
oo disease by plants or trees in their vicinity, and especially those 
seen are rich in volatile oils, or which inhale a strong odor. 
Invention of apparatus convenient of use, for throwing different 
ane solutions or powders on the vine. 
(9.) Indications of the measures which may be prescribed by author- 
ity for preserving the = -houses, and even whole vineyards from 
the ravages of the dise 
e society at the same tine issues a list of the different works which 
have been published on this subject, and will distribute all these docu- 
ments gratuitously. 
SCIENTIFIC INTELLIGENCE. 
I. Cuemistry anpD Puaysics. 
few Bases — Palladium ne ne vs palladium, 
Pd ‘ch pres with ammonia, as is well known, two compounds whic 
have the e same enciniaian but which differ ain in: aarti the one 
being dark rose-red, the other yellow. These compounds pee 
studied by Vauquelin, Kane, Febling, and Fischer, and found to be rep- 
resented by the formula Pd Cl+-NHa, but their true nature has re- 
mained unknown, Miiller has given the subject a careful investigation 
