SURVEY OF MASSACHUSETTS. 89 
sil alanis eo ee < Journeys with Chronometers. Dlstupeneiene used,| Paine’s Longitudes. seg os 
11 | Nantucket, 10 28 70° 6'12”.15|/— 1..73 
12 | New Bedford, 18 54 70 55 49.35) + 4 .96 i 
13 | Newburyport, 16 46 70 52 47.10) + 5 .80 
14 | Northampton, 24 74 72 38 21.00; + 6.06 | 
15 | Pittsfield, 13 39 73 16 5.10; + 28 .98 ! 
16 | Plymouth, 10 33 70 40 27.60) + 8 .33 | 
17 | Providence, R. L., Il 40 71 24 48 .00) + 13 .59 | 
18 | Salem, 14 42 70 53 56 .70/ + 3 .67 i 
19 | Sandwich, 13 38 70 30 27 .00/ + 13 .81 | 
20 | Springfield, 16 51 72 35 47 .25| + 2 31 | 
21 | Taunton, 12 36 Wi. 6.4.50 + .9 47 ; 
22 | Truro, 7 24 70 4 ° 8.70 | + 18 .87 | 
23 | Williamstown, 10 28 73 138 19.50) + 19 .24 7 
24 | Worcester, 15 45 71 48 10 .20;|— 2.84 
25 | Squam, 2 14 70 41 8 00|— 4 .33 | 
26 | Cape Ann, 2 14 70 34 44 .00|— 4 .05 i 
27 | Eastern Point, By bearing from Gloucester Point. |'70 40 12 ..75| + 1 .90 \ 
28 | Baker’s Island, 2 | 14 70 47 37.00; + 8 .59 | 
30 | Cambridge,* West of State House, Boston, . . . 3 6.42 
31 | Dorchester,* West of <«§ (¢ “ ee. 11 .24 | 
82 | Southwick,* West of Springfield Court House, . . 12 59 .86 
Comparison of the latest elements of the spheroid obtained by Bessel, from the mean 
of the ten surveys hitherto executed, (see Astr. Nachr., No. 438,) with those derived by 
me from the triangulation of Massachusetts, combined with Mr. Paine’s differences of 
latitude and longitude. 
Blomens bg ge hl 
Equatorial radius in English feet, - - - - 20923597.14 | 20914728.00 | 
1s miles, - - - 3962.803 3961.123 1.68 miles, 
Polar semi-axis in English feet, — - “ . - 20853657.16 20854128.00 
es . UM miles, - - - - 3949.556 3949.646 0.09 miles. 
Degree of the meridian for lat, 42° 21’ 30” in feet, 364403,28 364356.00 47.28 feet. 
Degree of the perpendicular to the meridian do. do. 365740.21 | 365511.33 | 228.88 feet. 
Degree of the parallel for lat. 42° 21‘ 30" do. do. 270262,09 | 270092.12 | 169.97 feet. 
Latitude of the southernmost point Nantucket, - - 41° 16'5'7’.19 | 41° 16'56".62 0.57 
Latitude of the northernmost point Newburyport = - 42° 48’32.00 | 42° 48’ 32'.15 G”.15 
The comparison of Mr. Paine’s differences of longitude by chronometers with those of 
the triangulation, reduced respectively by Bessel’s latest elements of the spheroid, and 
those obtained from the Massachusetts survey, gives the following results for the several 
stations, referred to the Boston State House. 
Paine West |Bord Testi) Sains Vics orden We 
No, Station, of Borden ts ot Bessel in No. Station, of Borden i Or Bessel in | 
Sons ananant cine | ee ae : Sy ane 1e. time. 
| 1 |Boston, 0.500 0.500) 15 Pittsfield, “+ 1.9938) + 0.838 
| 2 |Amherst, +0.49) +0. 22] 16 Plymouth, +0..56) — 0. 06 
| 8 |Barnstable, +0.15] —0. 12] 17 Providence, +0.91) +0. 05) 
| 4 |Cambridge, +0. 62) +0. 01] 18 Salem, + 0.24, —0. 02! 
| 5 |Dedham, — 0.67; +0. 02] 19 Sandwich, +0. 92) —0. 08) 
6 |Greenfield, +0.31) +0, 23] 20 Springfield, +0,15) +0. 23) 
| 7 |Gloucester, +0. 18) 0, 05) 21 |Taunton, + 0. 63! +0. 00 
| B polabsl Hole, + ° OL): see 0, 06 22 a Light, Hees oo yA 4 hi 
.owell, ——0. 32) + 0. 03) 23 illiamstown, Pe oe . 
10 Monomoy Light, +0. 61) —0. 16 24 Wordepier —0.19) +9. 11 
| 11 |Nantucket, —0. 11) —0. 14) 25 Squam Light, — 0.29) —0. 05) 
12 |New Bedford, +0. 33) — 0. 02)] 26 |'Thacher’s Island Light, — 0.27) — 0.07 
| 13 |Newburyport, + 0.39) — 0. 03] 27 [Eastern Point Light, | +0,13) —0, 05, 
| | 14 Northampton, +0. 40) + 0.24] 28 [Baker’s Island Light, +0. 67, — 0, 04) 
| * See note on preceding page. 
VOL. IX.—26 
