File:Geology and underground water resources of northern Louisiana (1906) (14576513140).jpg

Identifier: geologyundergrou00veat (find matches)
Title: Geology and underground water resources of northern Louisiana
Year: 1906 (1900s)
Authors: Veatch, Arthur C. (from old catalog)
Subjects:
Publisher: (n. p.)
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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tached, are turned with clamp as shown, and when theauger begins to choke it is hfted and dropped by the boy turning backon the windlass and letting go. This jumps the dirt up in the bit andso frees the lower end. This process is repeated until the bit is full,when it is lifted to the surface and emptied. By this method from 7 to10 feet can be bored without emptying. PLATE XLVI (From United States Geological Survey) Drilling with iron poles and rock drill. Drill is jumped by means of pivotedarm, which is pushed outward and then freed from the cogs on theupper wheel of the windlass (fig. 31, p. 93). 344 5 JQ (T S C ^ • :; ° s: § = ^ s^.s- . ft cr o -tP- >. ^ — 5 3 !° «^. c ^ ^ £ c iz: I^ B s ■ Sorq 3 ^ 2 o = o -^ rr s 3 en ►« S- S ;!1 ■ -^ o ^ n 3* iij „ 3^ t^ fT> ft o, O > :z:o< -t ;:l ^ n r^- r-- ■^ n c r/i T) P3 ■d o 3 — ^^ ft ft ft c^3 n E - • 1 ffl 37Q ^T! ft TI »-*l d 1O ftft 7) ft !a B u- 01 ■ v; ft<ft ft ft 3*fta. -^ Si cr » 0 1 ^ ft
Text Appearing After Image:
dl La. Geol. Surv. Rktort of 1905 Huti.. 4, Pi,. XLVI.

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