U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 81. ART. 18 PL. 3 



Dinosaur National Monument Quarry 



Sho>viiig the nirlliiiil usimI in lowfiiiiL; hirse bont'S from the steeply incliiieil I'iht of tlir (iiiniry. From a 



photograph by Earl Doughiss. 



iX'^^'T-s^'vK-. 





y,-'' 



Dinosaur National Monument Quarry 



Showing the nietliod of rcinoviiig huge liloek.s of i]hislcr-inease(l lione.s from llu^ ipiarr.X' to a point acfes- 

 sil)k' to wagons. From a pliotngraph t).\' Dr. |{. ('. Ma\. 



