550 BAROMETRIC ALTITUDES. 
Bed of Slate Creek at bridge on road from La Porte to Portwine id ‘ : . 4318 
Lowest bed-rock near bank at Portwine . ‘ ; of eh : : ‘ ‘ 4853 
Summit on trail from Portwine to Morristown ; ‘ ; : : - 2 . §345 
High bed-rock visible on Morristown trail, on Canon Creek side of ridge ‘ 4 b 5165 
Bed-rock at Gardner's Point, opposite Yankee Hill... ‘ = : : : . 4845 
Bed-rock at outlet of St. Louis mines, near Cedar Grove Ravine . : t ‘ : 4993 
Pine Grove, G. W. Cox’s office. : : ; ; : ; : : ‘ . 5486 
Bed-rock at Pine Grove mines, above Mr. Cox’s house ; : ‘ : : F 5396 
Howland Flat, Becker’s Hotel, second story . : : : ; ; : : . 5610 
Mouth of Bonanza Tunnel, Potosi. : . “ : ¢ : ‘ ‘4 5655 
Bridge over Slate Creek on road from Potosi to Gibsonville, estimated twenty-five feet 
above bed of creek . : : ; , : : 5 ‘ 5 ; . 9505 
Summit of trail from Potosi to Poker Flat . ‘ : : ‘ : ‘ , 4 : 6370 
Mouth of tunnel in Cold Caiion . é ’ . . : . : ‘ ‘ . 5626 
(c.) On Morristown and Eureka Ridges. 
Bridge over Caiion Creek on trail from Portwine to Craig’s Flat, estimated ten feet above 
bed of creek . : : : : : : ; ‘ : : : F 4262 
Bed-rock at Craig’s Flat : 2 : ; ; 4 . : ‘ 5 : » oboe 
Bed-rock at Morristown. ‘ : , , ' , , 4 : ; ‘ 5160 
Bed-rock at Deadwood . : : . > ‘ : : : : : , » CERI 
Mouth of Bunker Hill tunnel, head of Grizzly Cajion . , : . ; : ‘ 5900 
Bed of Caiion Creek at Poker Flat ; . ; ; ; q : : , _ 4854— 
Top of bank at Grizzly Hill, near Brandy City . i , 2 : " . ; 3560 
Bed-rock in Brandy City mines, on Camptonville trail. ‘ : : : : . 3435 
Brandy City Hotel, first floor . : ; : ; ; : ye a’ : 3650 
Bed-rock at Arnott’s mine, near Windyville . : ; : ; : : = . 3040 
Bridge over Little Caiion Creek on trail from Craig’s Flat to Eureka, estimated fifteen feet 
above bed of creek . ‘ ’ : . : : : ; ‘ . ; 4360 
Eureka, Wolfe’s Hotel, first floor . ; : : : : ; . ‘ feted 5138 
Bed-rock at Mugginsville . ‘ : ; : ee cas e ‘ . . ‘ 5090 
Mouth of Hardy’s tunnel =. : E 2 ; : ' : es . 5038 
(d.) Near Dosmidens 
Downieville, St. Charles Hotel, first floor . , : : . - 5 P 2806 
Monte Cristo, Mr. Thatcher’s house : : : : . 4 ¥ : . 5056 
Mouth of Empire tunnel, Monte Cristo. : ; : : ‘ ‘ : : 5010 
Summit of sag above Monte Cristo, on trail to Excelsior . : ‘ ‘ 5 ‘ . 5492 
