Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 395
The days of old,The days of gold —The days of 49. Of the various methods of liberating our yel-low slave from the hard clutches of the earth, itwould take too long to speak in detail here;but they are broadly divided into two classes,according to the surroundings of the gold it-self. Free or placer… … HYDRALLIC MINING — BREAKING UP ROCK BY TWO GREAT STREAMS OF WATER. extracted — this precious needle from an enor-mous and worthless haystack — by means of itsown weight, water being applied in variousmanners to give that weight a chance to assert OUR YELLOW SLAVE. 9II itself. The mined gravel is…
Children's literature
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