[24 DESCRIPTIONS OF MINERALS. 
In the “‘ Elements of Metallurgy,” of J. Arthur Phillips, the yield 
for 1872 is given approximately, as follows : 

Lbs. Troy. 
Great, Bitoni aut sic ethos elas: ee ee 52,400 
Norway andisweden aye. see ee uae 15,000 
Hungary, Transylvania, and the Banat... 92,000 
DAMONUY cis ular seer cane 80,000 : 
ER eT eds Hes rotten ay Bete Rd SOOO mirceue bee oars 178,000 
Rest of Germany....... 60,506 
PRUSSIA gs: Beale pede dah ca Meh 8 i ea eee 50,000 
PUA TUCEE pylon. l! Gens echnical nae 16,500 
LEA ger he cates es ee ee ts" sh es eid suede ae 8 eee 32,000 
io) CLL G ey peepee cea fe Sewn eee oa Oe Tee renee ae meas sn 100,000 
1 EES GL ee ee CN hy EAA Se SURI Dace aOR 200,000 
BO) ING, Seema omen ane nea Enno: @ War Mr omer Poa Ty 450,000 
Cilio 400 eae a Mies ghee tenn wee eae oe oe 00,000 
Central: AtmeniCaaniaces eats as See 53,900 
MieKIGO gion: gue cyt cece eae on Se eee 1,000,000 
WinitedeS tates; odvactuhts unm soiree eae ee 1,250,000 
AP Otel cake... rate eee 3,788,900 
Mr. Phillips states that the total for the year probabiy amounted to 
4,100,000 lbs. troy, the value of which is £13,000,000, or ¢63,000,000. 
In the above the amount from the United States is diminished to make 
it correspond with the preceding statement for 1872. 
The fcllowing table gives, in dollars, the estimated value of the 
world’s production of silver in recent years: 

—— 
Mexico and 
Spa rriey JAsTV Other Countries. 
Russia. United States. 

1SD0E KOO OCO sia sue ae. 50,000,006 10,000,000=40, 600,000 
1860 | 650,000 150,000 | 80,000,000 10,000,000 =40,800,000 
1865 | 700,000 | 11,250,000 | 80,000,000 10,000,000=51,950,000 
1870 75,060 | 17,320,000 | 25,060,000 10,000,000 =57,895,000 
1875) 500,000 | 31,685,000 | 25,000,000 10,000,000 = 67,135,000 





The total for 1874 is estimated at 76 millions. 
The world’s production of silver for the period of twenty-six years, 
from 1852 to 1877, is estimated at $1,341,800,000 ; for the preceding 
twenty-two years—from 1830 to 1851, inclusive—at $600,400,000 ; for 
the preceding thirty years—from 1800 to 1830—at $799,100,C00. 
Native Platinum. 
Isometric : but crystals seldom observed. Usually in flat- 
tened or angular grains or irregular masses. Cleavage none. 
Color and streak pale or dark steel-gray. Lustre metallic, 
