Observations upon the Dip of the Magnetic Needle. 87 



No. 3, 3F18'-T 



No. 2, 30°56'-l 



Mean, 3i°07''4 



Manilla, top of Messrs. Sturgiss & Co.'s buildings, one of the 

 stations occupied by Capt. Wilkes of the U. S. Exploring Squad- 

 ron—April 12th, 1842. 



No. 3, 16°20'-5 



No. 2, 16°2r-l 



Mean, 16° 20'.8 



Canton, China, mean of numerous observations upon the top 

 of different factories with Nos. 2 and 3, from the 14th to the 



16th of May, 1842, 32° 26' -2 



Hongkong, near the Queen's Street Baptist Mission Chapel, 

 Sept. 21st, 1842. 



No. 3, . " 30° 58'-8 



No. 2, 31° 00^-6 



Mean, 30° 59'-r 



Wantung, Canton River, mean of observations with Nos. 2 

 and 3, in different parts of the island — now occupied by the new 



fortifications, 31°49'-4 



Amoy, China, (island of Koolongsoo,) gardens in the rear of 

 the house occupied by Rev. Mr. Abeel of the American mission. 



No. 2, 35° 28' 



No. 3, . 35° 13' 



Mean, 35° 20'-5 



Honolulu, Oahu, Dr. Wood's yard, formerly the U. S. consu- 

 late, and one of the stations occupied by Capt. Wilkes. 



July 19th, No. 2, 42° 14' 



" 20th, No. 2, 41° 51' 



No. 3, 42° 18' 



Mean, 42° 08'-l 



Hilo, Byron's Bay, Hawaii, Rev. Mr. Cowan's gardens, Aug. 

 23d, 1843. 



No. 2, 41° 04'-5 



No. 3, 41° 23'-2 



Mean, 41° 13'-8 



Preferred, 41° 10' 



