536 | BAROMETRIC ALTITUDES. 
Mouth of Wolverine tunnel, above Independence Hill . : 4 " af on . 8025 
Bed-rock, Metcalf’s claim, above Independence Hill . : ‘ " oem ‘ 2943 
Crest of ridge about a quarter of a mile northeast of Independence Hill . : ‘ . 3469 
Rim-rock, Roach Hill : : ’ ; ‘ . : ; ‘ ‘ i ’ 3037 
Strawberry tunnel, just above Monona Flat, Indian Cafion —. 5 . aad . 3160 
Crest of main ridge, just south of Green Valley gorge . ‘ ; ‘ ‘ F . 4125 
Mouth of Nabor’s tunnel, Green Valley gorge ‘ ; : é ‘ / j . 8127 
Bed-rock, spur next northeast of Green Valley gorge . . ‘ . . ; ; 3881 
POINTS NEAR AND ABOVE DAMASCUS, SOUTH OF THE NORTH FORK OF THE AMERICAN RIVER. 
Mouth of Humbug Cafion.. ‘ , : ; : : : ; ; , . 2080 
Hotel at Damascus . : ; : : : ; : . : : : : 4006 
Mouth of Mountain Gate upper tunnel, Damascus. . . . «. «. «. «. 8867 
Mouth of tunnel, Cement Mill claim, Damascus . : ; ‘ ‘ 3 . , 3827 
Bed-rock, hydraulic pit, Damascus : : ‘ ; : ? 4 ? ‘ Fs 3922 
Crest of main ridge, over Mountain Gate tunnel, just back of Damascus’. : ‘ 4641 
Highest bed-rock in road, half a mile northwest from Damascus ‘ : . ; . 4073 
Bed-rock, on ditch a mile and a half above Damascus . : ‘ ; : p : 4177 
Forks House, above Damascus 5 5 ‘ ; . ¢ : : ‘ : . 4764 
Forks of road on crest of ridge immediately back of the Dam claim, a mile and a half from 
Forks House ‘ . i , ; : ; ‘ , 5 : ' 4560 
Mouth of tunnel, Dam claim : ; ; ‘ : : ; : ; ? . 8671 
Crest of ridge between Forks House and Hog’s Back . ; P : : : ’ 5436 
Secret House ' ; . : ; ; : : . : sree & j . $423 
Summit of Secret Hill  . : z ; ; F . ; ‘ : : : 6536 
GOLD RUN AND NEIGHBORHOOD. 
Level of tailings on North Fork of American River, near outlet of Indiana Hill mines, 
October, 1870 . ae re. Mpeg , tg et eee, a 
Summit of hill between cement mill and Cajion Creek ; : : ‘ : 3099 
Bed-rock at entrance of tunnel at cement mill, near Indiana Hill i ‘ y . 2792 
Highest pressure box, Indiana Hill mines, northwest side . : : : : 3179 
Point on bed-rock spur, one eighth of a mile S. S. E. from Fiddler’s ranch ; base of Cold 
Spring Mountain, lava and cemented sands . é . . ‘ : : . 8284 
Top of Cold Spring Mountain . : ; : , ; ; ’ : : : 3679 
Top of old ’49 shaft, Potato Ravine : : : d 3 : ; E 3 . 29564 
Edge of rim-rock in Rattlesnake Ravine, near Gold Run. pasty «ae . “Sat 
