500 SEVENTH REPORT—1837.. 
ERRATA. 
Page 32, line 4, omit giving each equation a weight proportioned to the 
number of observations which it represents. 
8, for 8 = 68° 42’; r = — 0:013608, read 3 = 68° $3/; 
r = — 0°01405, equivalent to 71 geographical miles for 
one degree of dip. 
General Table. 
” 
Page 44. Frazer’s Lake Intensity for 1-724, read 1-734. 
»  Stuart’s Lake ” for 1°786, read 1°745. 
» Fort Alexandria » for 1710, read 1°714. 
Page 45. Multnomah River 7 for 1:669, read 1-660. 
»  Sandiam River - for 1°683, read 1°672. 
» Columbia Rapids ts for 1°679, read 1°671. 
rt Thompson’s River < for 1°710, read 1°701. 
» Oakanagan » for 1°707, read 1°701. 
»  Wullawullah River és for 1°707, read 1-699. 
Page 46. St. Francisco Longitude for 235 45, read 237 35. 
+ San Solano A for 235 36, read 237 36. 
» Monterey 4 for 236 00, read 238 00. 
es San José 3, for 236 00, read 238 00. 
iy La Soledad as for 236 36, read 238 36. 
Page 47. San Antonio * for 236 42, read 238 42. 
3 San Miguel 3 for 237 16, read 239 00. 
4 St. Louis Obispo e3 for 237 20, read 239 20. 
3 La Purissima Sy for 237 33, read 239 33. 
if Santa Ynez is for 237 49, read 239 49. 
7 Santa Barbara Sy for 240 00, read 240 20. 
And in the column of Intensities : 
St. Francisco, Solano, for 1°610, read 1-614. 
San José for 1-605, read 1°607. 
San Miguel for 1°583, read 1°580. 
San Obispo for 1°583, read 1°580. 
Santa Barbara for 1604, read 1°587. 
