110 Scientific Intelligence. 
11. Action of manganic peroxyd on uric acid.—C, Grisert WHEELER | 
finds that when uric acid is warmed with water and manganic peroxyd, | 
and sulphuric acid added in small portions, so long as any action is ob- 
served, the filtrate yields on concentration, crystals of parabanic acid, 
But that if the mixture of water and uric acid be treated wit 
oxyd so long as carbonic dioxyd is evolved, and the whole filtered, man- 
ganic oxalate is left on the filter, and the filtrate contains allantoin and 
(61 He gives the — as follows : ie : 
,H,N,0 Mn +(H,0),=—(€,H.N,O 0H,N, 
‘(ste 20.) a Mineo Hoe the sues Sheet he chs Zeitschrift 
Sir Chemie 
12. Indiwm.—Fremy exhibited to the Academy on the 22nd of April, 
in behalf of Professor Richter who was present, two ingots of indium ob- 
tained from the Freiberg blendes, which were about a decimet igh, 
a few centimeters in diameter, and weighed 500 grams. They wer 
valued at 20,000f. > 
13. nsion of metals and alloys by heat—A. Marrnressen has ap- 
plied the hydrostatic method—by means of which he determined the 
expansion of water and mercury (see this Journal, II, xliii, 254)—to 
metals and alloys. The unit of volume at 0° C. becomes at t 
a 5 
Vise 1h: ie ag 
. F000 + e00000 ! 2 
and is at 100° C. equal to14<¢. The values of a, 4, and c determined 
} 
y him are as follows: | 
a. b. e. 
Cadmium, 08078 0140 0009478 
Zinc, 8222 070 8928 
Lead, 8177 0222 8399 
Tin, “6100 0789 6889 
Silver, 5426 5 5831 
Copper, 4443 “0555 
Gold, 4075 4411 
Bismuth, "8502 
ieee re 0280 ; 
imony, 2770 97 3167 
Platinum, 54 0104 2658 ; 
He investigated the following 19 alloys: 1. Sn,Pb; 2. Pb,Sn; 
— Saks 4. SnyZn; 5. SngZn; 6. Bi,,Sn; 7. BiSn,; 8. Bi,,Pb; 
BiPb.; 10. Cu4-(33-85 vol.) Zn; 11. AuSn,; 12, Au,Sn-; 13. Age 
Au; 14. AgAu; 15. AgAu,; 16. Ag+( Sie) 
(48°06 vol.) Au; 18, Cu-+-(28°31 vol.) Ag; 19. Cu+(73°13 vol.) Ag | 
The vol at 100° C, was determi 
volume ned as above and nie | 
from that of the component metals; he obtained also the specific gravitfy | 
— im an earlier investigation the electric conductibility. The results — 
us obtained are: ee 
t 100° C. i : bility. 
Observed, : Calculated. cee es joan pe One. ; 
1007188 =—=-:1:007295 ~=— 8-188 8203 10:57 10°63 
0590 = 10-645 43 
8419 8129S «10 8-28 843 
91888847 «'10-246 =—«10-246 19611372 
184 CO oe te oe eae 1S 
