Show the he source 01 ol petroleum and M nybro carbons in he abc WHIM basin t by km douggans Dou glans Call legill pittsburg pa 1 1 to kiy to get answers to of the chith viii Il wele proposed pio posed in the pieced ing article lot let its U flint find out what Is a the most probable theory foi the origin of petroleum if ne e can do tills this VM will bo be well stalled on oni way origin of Petiole uni you mould be beaded by a h detailed discussion of tho the theories concerning the origin of petroleum but no M will mention them and give briefly the reasons for accepting arc epting or i ejecting them they are the following a mineral bilgin b animal origin c vegetable oi agin a it Is claimed that petroleum has been foamed in the by chemical process thus showing that it might bo be pos possible gible that in exceptional case especially it in volcanic dish lets a small might bo be produced in nature dut but thelo theio stems at present no reason to believe that it has generally genei ally if evoi been formed that way and this theory bould be apt to mislead lather than safely lead the to loi oil we belle belleve believe ve that tile tho conditions under which most of it is boim cd do not tit at present point to this thin mode of origin b products similar to petroleum can be produced from froin substances in the laboratory but we knovs of no place today wavie animals ate aie burled buried in sands hands and mud in fitt f f detent q quantities tian es to produce any largo large amount of oil nor dos dope it seem probable that it has been done vei deiy y extensively in past time the hard parts like shells and bones tire are often preserved but the so BO ft decompose so rapidly and t into the water or atmosphere or are destroyed by other animals or by bacteria it is supposed that forms of bacteria are the media by which this organic matter Is partly decomposed and chang d into oil but it Is difficult I 1 for tile the geologist to see how animals can bo be bulled in the eaith in such great quantities as to be large of yeti peti oleum c e we know that vast quantities of vegetable lege table matter have been burled buried in the alto arth and that petroleum Is usually if not always quite dosola associated with strata that contain vegetable mat iter ter the later often being in tile the form of 0 coal Petrol petroleum cuin lias hah been produced from vegetable sub substances atances in the lab oratory It elation ution of Asp linit to petroleum the large island of trin trinidad is part of an old I 1 d delta which has been cutoff cut off from the continent of south averi ca by an incursion of the sea near the center of the island to is a famous lake of asphalt on the coast in places are sea cliffs which have exposed the strata thus furnishing excellent object lessons in the relation of coal asphalt petroleum etc in one place a stratum containing coal 00 lignite dips beneath the tide level and in a little distance emerges here there is no coal but a band of clay has been changed to lanite evidently by the ignition of petroleum in other places place oil exudes from the rocks but one does not need to go to trinidad 00 oo to the aas asphalt ridge westi of vernal theio e you may see aee clays or f r hales containing much impure coal trace it it a little d stance distance and instead r afi 0 coal you see gee sandstone r saturated with asphalt f in small spots the asphalt is soft not yet thoroughly hardened note since writing the above I 1 ha in i nal express that thick gy oil very daak color I 1 beeps through uchi crevices in I 1 tunnels which have been worked in asphalt ridge ti I 1 ha bavei not seen been the oil but it would expect no great depth it seems to be a if strata full off vegetable matter becomes covered by porous sandy or gravelly strata more or volatile matter that which evaporates ic escapes leaving leavin gothe the remains of the vegetable mat ter as coal it if it lae isi covered fithian wl wi than thian impervious stratum such e ay clay and apen then by a great weight and depth of i other iother strata it forms petroleum liquid petroleum and hard dry coal may mayi seem to be very different products product ii and they jare are but they may be made from the same substances I 1 housewives and bachelors bache lorm loo know r that it if they forgot forget the grease animal lor vegetable in the skillet ski lleti and it catches on fire the r volatile matter evaporates and burns leaving a very black residue in the skillet this residue to is almost pure carbon the rhe same substance ras r as anthracite coal i it is thought by some that if the vegetable matteroli matte rols i subjected to a great pressure of the overlaying rocks and the depth rises the tempera tem perit ture the results are pro probably bibly similar to treating the matter in what is called a closed retort by greater heat without pressure the overlying clay prevents the escape of volatile matter some think that whether coal or oil are found depends not only on the conditions of the lock the pressure the temperature etc but also on the kind or nature of the original plant material in the laboratory asphalt can be produced from petroleum which hasan has an asphalt base and substances similar X K f ditke base for the derivation mon of of asphalt 1 gilsonite and other othe badro carbons carbona except from petroleum to be continued next week |