augers lo l in (3 Ice!) are used al rrunes, and inosl earry eriensrons lo inake a 2 rn wide shall, Very large pneuinahr blowers are mnemonnled hr rernove loose normals, and are oherr loeally node as as lhe Coooer redy opal inines in Ausrralia, large—bore drills lhere are called oldwells alber lhe invenlor and are used (or underground housing, ereavallon, shalls. and lunnels up rol 5 in is leelldrarneoer aploslves are o1 rnosl use lo assrsl auger holes in hard ground, lo rnake holes in olherwise unsublz ground sueh as inaishes, or lo loosen roek in qnames mrh lhe advenl ol lhe swarnp lrarlor, rnarsh olasling is less eooirnon, our lhe bisxc ease and elleeriveness ol explosives should riol be overlooked where lhey can solve seine olherwise rnliaelrble problems. Nllroglyeerlrie leellulose lrealed wilh aeid, in glyserrne, absorbed inlo wood dusl or elay earlhsi as gelignile, dynamrle, or plaslique is an inexpensive way or solve sorrie earth—moving problems Even elieaper is lhe nux ol arninonruin nrlrale serliliser and dieselrne known in lhe lrade as ~ehrekerishrl" lnrlrales have lioiri anrieril lirnes been gaiheied lioiri nianuie, around lhe soil ol luilel prls, or exlrarled by washing and evaporallon lrorri guanol. old ~reeipe~ books give doreiis ol ieliable recipes lor rheap Elploslves, and errn cusrard powder, llrrrrr, rir larepowder will blow a 100m aparl, as will lhe lunies irorn elher or dornesiie gases l once worked as a ' glassblower, and nianaged lorenirir .illdnors and windows lruni iriy room by alluding elher lo evaporale lrern a bollle Earllev, as a haker in my lather: husiriess, | erealed some speelarular llashes rising plain llour near open llaines Today. we inusl lake a rourse lo oblaiii a "ponder monkey" eerlirreale in order lo sol our own explosives. or we should hire skilled people, leslerday lpree rerrorrsll, we simply rnade lhe slull up and lel il go, wilh siripiedielable iesulls and ollen loo rnurh olleel Hflnulxr eo There are several ways in whrrh lhe duiel bur poweer aerron or waler iris asslsr our endeavours. Firsrly, a sirriple lel norale hxtd inside a pipe and eonneeoed |o a garden lap may well serve lo drill a waler bore la waler spearl in a few niirirrles or hours in sands, gravrls, or deep roilr Secondly, an old hosepipc raslened lo a sharpened pile or posl and eonneeled lo a here will serve lo sink ,elly pilings in sill or sand in very lrllle lriiie A M prunp leninnreieially avarlablel will reinove sill, sedirnenl. niulrh, and even large gravel born a darn. and deposil iheee behind a reiarnrng wall as rash lerrrse soil, while lhe wrier nows bark lo lhe darn Las|ly, )as liied as loose sedimenl washes down gravels, sands, and sods lor rninriig, as lerraoes, or lo ierriovelaivd slips lroui roads and lields Quire precise eonlrol ol such aehon is aehievable Hydraulrr nozzlzs, drills“, and lei purnps are all inade by lnduslry lo serve lheae purposes, arid also lo sleer deep drills in boreholes lu sperrrir loealions underground when rapprng lherrnal energy, or lor venling uunes and raves Again (as wilh erplosivssl ll is enough lo knuw lhe range ol user, keep lheni rri rnind, and lo gel good adviee il lhe need arises, lnadverienl rel drilling has a powerhrl pulling r and iel purnpswilh lheiririorors, rails, or plalloriris ran be dragged lielow waler or across lhe gmund il one rs lell unallended. cerarronally, a garden hose will bury iisell in sandy soils in lhis way and so be losl rowerlul air reis new lake grave-ls lioin rnines in much lhe sairie way, and a whole series ol rurbines and powerlul prslons operale lroin pressure applied by waler, air, or erl (me serenre is applied hydraulirs, or pneuniairrel, A lei plus a eulrrng drill will eool lhe area and remove wasle, in one operadon. Finishing Rakes and mllm are lhe lools lor linishirig erravaled earlh; lhe loriner lo line level, lhe larrer lo eoiriprei. Cornparriori is only neeessary vvhere harrie or waler relenlion is inlended, bur where rl is neeessary my need lo be aeeoiiipariied lay waler sprinkling in dry (ondinom Care niirsl be laben lo rompael only I540 ern «H2 rnrhrsl ol soil lhoroirghly al a nine Even very heavy inarhines ean seldurn cernpacl deplhs greaier lhnn 38 em lls inehesl, and inipaei or hand rorriparlien is ellerliie lur less lhan hall lhal deplh ii is neeesrary |u sinrily adhere lo lhis earehrl eoinprelion lur darns and house loundaiurns Modern eoinparling inaerirnes rillen iibrale. using a pneunihlir ur mechanreal eererilrie wriphl lo irnpael and shake soil as H is eerihpaelrd 9,9 EARTH RESOURCES whenever earrh is moved, ll seldom reveals a uriiiorrn eoniposriion; in laei, rnosl excavlhun reveals rrialerrals already sorred by nahire, and m‘ speeilrr use. To mix lhein up is lo set brck lhe clo