422 Scientific Intelligence. 
that De Luc’s chapter, a referred to, is especially devoted to anec- 
dotes on the subject in ques 
[We happen to know that this | knowledge had long been in Mr, Brown’s 
possession, at least for the last nine or ten years of his life, during which 
the water-controversy has been so rife, if not from the time when he fur- 
nished Cavendish’s biographer with incidental eae also that he © 
regarded it as decisive of the controversy. So remarkable a retinence in 
such a case is probably unparalleled, but is perfectly characteristic. It is 
to be hoped that Mr. Brown has left some record or indication to show 
how re reconciled De Luc’s statement, in 1787, of what occurred in 1782 
with his (De Luc’s) letters ye i in 1783-4, now published in the 
Watt ort eiipeedlies: The only apparent solution of this new enigma, 
consistent — the idea of Del Let ihe is that he had at the 
tim 
lapsus for that of Watt is pretty certain, So, De patie porn pub- 
com wiuhication —mpy be r earded as his own reversal of the views he 
had expressed in his esineepondence with Watt, and even as an indication 
of the understanding of the parties at the time. And it is singular that 
its republication now should close the Jong controversy which followed 
the resuscitation of this correspondence by Arago.—Ebs. 
n the Electric Conducting-Power of the Metals ; bet Aveustus 
Marratessen, Ph.D., (L. E. and D. Phil. Mag., vol. xvi, p. 219).—The 
following values for the conducting power of the metals were determined 
in the Physical Laboratory at Heidelberg, under the direction of Professor 
Kirehhof, by the fame method as is de scribed in the Philosophical 
agazine, ” Feb. 1 857. Conducting Power at Temp. i in Contigrade 96 
°° 
1 ne ee a eae er eran eee Oe 0 
Mopeet NO! 3). keds as tc lies en. eeRe t 47°43 18°8 
emetiet, Noy Fs oa. evdawnond cnvavk <6 72°06 22'6 
Goll, » sneer ess wien bad eunwtig ahead 55°19 21°8 
ee eS en ene 217 
Aluminium, ot Aibalys 0% Kes a a 33°76 19°6 
ND ae ai Sane cd iri piesa 30°63 24°2 
Bike, eevee 1 ulin ddan cave: 27:00 17°6 
Mg 0 seca he fae A ewe eens co ROM 17-0 
NNN 5260 8 5404 1500 5N Oe Ei os 2 eaues OST 16'8 
Cadmium, .. ie hws CEE 2, 0d eee 1 
eaeictld wa die ee tees 20°85 204 
“pa ot UOHEK ES eo ee ie ey 19°00 20°0 
A wi ra ee 20°4 
Palladium, oo ON EC ELEY AEE Less 12°64 172 
Bh 0% be aw oe eee PP EERE GE SERS ee 11°45 210 
PMN Gs os es OEE EEE i eNews 10°53 | 20°7 
BERS = Mike es Oi 177 Ls 
BUONO. ccc. ue eas ee GS eae ce CeN Meer E ! 187 
fam, . .'y ee. Yeres oe eS 6°71 20°0 
EE SA ene nee sii 1st 
Lek sits epre seue aeineit Tee 22°8 
Bismuth,.......... wee eee. ee via 
