530 BAROMETRIC ALTITUDES. 
Crest of Hangtown Hill, opposite preceding station . : . . . ; 
Rim-rock, north side of Cedar Hill, just east of Oregon Point . 
Rim-rock, north side of Cedar Hill, four or five hundred feet east of preceding station . 
Rim-rock, north side of Cedar Hill, an eighth of a mile west of Dickerhoff’s mill 
Small ditch opposite preceding station 
Level of South Fork Canal, opposite last station but one 
Crest of main ridge, opposite last station but two 
Track in tunnel at Dickerhoff’s mine 
Rim-rock, north side of Cedar Hill, first hydraulic pit east of Dickerhoff’s mine 
Lowest point of sag, under the flume, south of head of Cedar Ravine 
Highest crest of Cedar Hill, west of the flume 
Bed-rock, Franklin claim, Little Spanish Hill 
Bed-rock, east of Franklin claim, Little Spanish Hill . 
Crest of Little Spanish Hill . 
Crest of ridge, Placerville race-track . 
Mouth of shaft, Prospect Flat : : ‘ : " ; . 
NEIGHBORHOOD OF PLACERVILLE, NORTH OF THE CARSON ROAD. 
Bed-rock, Clay Hill 
Bed-rock, east end of Indian Hill 
Bed-rock, Pennsylvania claim 
Average bed-rock, Henderson claim . 
Top of bank, Henderson claim 
Bed-rock, Wick’s claim, Negro Hill . 
Bed-rock, Stevens’s claim, near Negro Hill reservoir 
Top of highest bank, Stevens’s claim 
Ward Brothers’ mill, White Rock, on about the same level as the deep channel here . 
On level of South Fork Canal, at a point bearing N. 65° E. about a quarter of a mile from 
White Rock store 
Near mouth of old shaft on crest of White Rock Point ridge 
Level of bottom of channel at Georgia Hill, just east of White Rock Flat 
Mr. Peer’s house, White Rock Point 
POINTS ON THE RIDGE ABOVE PLACERVILLE. 
Cruson’s house, Dirty Flat . : - ; 
Crest of hill between Dirty Flat and Smith’s Flat . 
