Silver, to the amount of $2,913,000,000, is estimated to have been obtained from the mines of the earth from the earliest times to the commencement of the Christian Era; from the date of the latter event to the discovery of America $521,000,000 were obtained; thence to the close of 1847, an addition of $6,025,000,000 was made; thence to the close of 1884, there was added $2,344,000,000; making a grand total of $11,803,000,000. The average loss by abrasion of coin is estimated by Professor Bowen at one per cent. per annum; and the loss by consumption in the arts, and fire, and shipwreck at $5,000,000 per annum. A cubic inch of silver is worth, at 48 3-4d., or 97 1-2 cents per ounce, $9.75; a cubic foot, $16.848; a cubic yard, $454,896. Silver, to the amount of $900,000,000, is estimated to have been in existence at the commencement of the Christian Era; at the period of the discovery of America it had diminshed to $135,000,000; after the latter event it gradually increased, and in 1600 it attained to $391,000,000; in 1700, to $1,410,000,000; in 1800, to $3,622,000,000; in 1842, to 4,998,000,000; in 1853, to $4,945,000,000; and at the present the amount of silver in existence is estimated to be $5,504,000,000; which, melted into one mass, could be contained in a cube of seventy feet. Of the amount of silver in existence $3,800,000,000 is estimated to be in coin and bullion, $1,200,000,000 in watches, and the remainder in plate, jewelry, and ornaments. Of the amount now in existence $4,722,000,000 has been obtained from North America; $613,000,000 from South America; $59,000,000 from Europe; $50,000,000 from Asia (including Australia, New Zealand, and Oceanica); and $60,000,000 from Africa. The amount of the precious metals in existence is estimated to be $13,670,000,000. Silver, so far as its annual product is concerned, has varied greatly at different periods. At the commencement of the Christian Era it is estimated to have been $4,200,000; at the period of the discovery of America it had diminished to $150,000; after that event it gradually increased, and in 1600 it attained to $9,000,000; in 1700, to $18,000,000; in 1800, to $38,000,000; in 1848, to $47,000,000; in 1863, to $63,000,000; and at the present time it is $114,000,000.