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TABLE shewing the variation of the altitude of an object arising from a change of 100 seconds in the declination. If
this esange moves the body towards the elevated pole, apply the correction to tbe altitude with the signs in the Table ;
Olberwin', change the signs.
LATITUDE

LATITUDE
Of same name as declination.

Alt. Dec. Dec.al. #v_609 50° 409 | 300 209 | 109 | 09

100 200 300 400 500 600 700

!! Of differene LAME FUM Eleclination.

18"

88 107

98 106 | 10

0

79" 89' 97'! 00|| 97'' 89' 79' 66' 52'' 351

0 18" 35" 52" 06
94 86 76 63 48 31 14 -4 23

4057 72
85 95 103 10

20
75
94 86
61 46 27 10 _9128

80
45 64 93 104

30
97 89 77 62 45 26 6 -14 35 55 91 106

74

40 140 46 1440 | 106 | 96 92 / 66

25
-21 44 67

50
109
93 73
50 25

301 59
85 110

60
115 99 60 27
43 79 114

70
125 82 35 -16 -69121

0

30 98 90 80 67 52

67
36 18

36
-0 18
52

90 | 98

10 1094

36
86

73
76 63
45 31 13 -523 41

53

97 104 94

20
85 74 61

27
45
9

82
-10 30

95 106 48 66

30 96 37 75 61 44 25 4 -17| 37 58

94 109 T

40 169 1640 104 94 80 63 44 22

-24) 48 70
92 111

50
106 90 70 47 21 -6

-34 62
90 115

60
110 84 54 21 -14
-50 86 121

70
117 73 25 -26-79132
99

81
91

0

99
81 68
36

53 63

36
53
18 0 18

91
95 87 76 63

31 13

42

74 89

59

-6 24
93

20
85 74 60
26 8 -12 31

50

94
63 98 109

30
95 86 74 59 42 23 2

-191 40
60

97 112
79

40 18° 18940 | 102 92 78 61 41 20

-3 -27 51 74
96 116

50
103 37 66 43 17 10
-39 67 95 121

60
105 79 49 16 -20
-56 93 128

70
108 64 16 -36 -89143

0
100
92 82 68 53 36 18 -01 13

53
36

68 82 92 100 95

10 87 76 63

89 100 48 31 12

60

43
-61 25
76

20
93 85 74 60 43 25

1333
52 70

30
94 85 73 58 40 21

-21| 42
63 82 (100

40 200 20440100 90 76 59 39 17 -6 -3155 78 100

50
100 83 63 39 13 -15
43 72 :00

60
100
74
10 -26 --63100

70 170

100 56

46

100 93

69

0 83 69 54 37

-0 19

54

83 93 101
37
19

78

10 96 88 77 63

91 102 48 30

45 12 -71 26

62 93

20 85 73 59 43 25

88 103 72

54

-15 35 94

30 85 72 57 39 19

66 -23) 45

86 103 22940 98 88 74 57 36 14 9 -34 58 82 104

50 50 110 97 80 60 36 9 -19

-48 77 106

60 117 95 68 38 4 -33 -70107

70 131 9247 -3 -56 -111

55 95 84 70 55 37

95 | 103|| 0 19 0 19 37 46

93 104 97

10 88

63 77 64 | 48

79 30

-81 27 11

20 93 85 73 59

74 42 24

---16) 36 | 56 93 84

30 71 56 38 18

-26 48 69 89 107 2440 97 8672 54 34

40 249 12 -12 -37) 62 50 ||107 93 ។ 56 32

50 5 -23

-53 83 111 112 91 64

160 32 -2 -39 -77115 123 83

70 38 -13 -67 -122 96 85 72

38 56

0

85 19

38 56 - 19

72

96 105
9889 78 64 48 30 11
-928 47 65 81

10

95 106 95 85 73 59 41 23 3 -18| 38 58

20 93 83 70 54 36

16
-6
-281 50 72

30 260|40 96 85 70 52 32

9 -16

-411 66 91 114
92 74 53 28
-28 ---58 88 117

50 109 86 58 27 8 -46 -84123

60 115 75 29 -23 -78 -134

70

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100 200 300 400 500 600 700 |A1 de

LATITUDE
Of same name as declination.

LATITUDE
Of different name from declinatiou

SINCE the former part of this work was printeu, a new form bas been given to Table XX. by which the last corrections of a Lunar Observation may be found very expeditiously. The correction in this new Table will frequently exceed those deduced from the former one by two or three seconds, on account of lav. "In using this new Table, it will in general he sufficiently accurate to and the nearest altitudes and dising fourth fifth , were omitted. tance, and take out the corresponding currection, without ibe trouble of making a proportion for tbe neg. lected degrees and minutes. Thus in Example 1. enter the new tuble with

the **s altitude 500, D's all. tude

70°, distance 500, which are the nearest numbers in the Table, the corresponding correction is 20"; as found before. In the second example tbe *'s altitude 100, D's 20°, distance 200, give the correction 22. In ihe fifth 17". In the sixth 19". These corrections are always additive. 27", being 4 more than the former method. In the third example the correction is 24". In the fourth

In using the second and third methods of working a luvar olservation, this correction is to be found in
the same manner, and added to the corrected distance, subtracting 18" tron the sum. Thus, in Example
I. the correction 20'' is to be added, and the constant quantity 18" subtracted, leaving *"' to be added in-
stead of 1", found by the former method.
TABLE XX. (New Form.) Correction in Seconds, additive.

True distance of the Moon from the Sun or a Star.
AR

O
o 600 700

© | 90o iOS up a } ) Alw

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EDMUND AND GEORGE W. BLUNT,

HYDROGRAPHERS,
HAVE OPENED A CHART AND QUADRANT STORE,

No. 149 FLY-MARKET-STREET, One door above the North corner of Front-Street, NEW-YORK ; where, by personal attention to business, thoy hope to receive that patronage which industry and perseverance merit. They have for sale

BOOKS: BOWDITCH'S PRACTICAL NAVIC, TOR, 6th edition, stercotyped. BLUNT'S AMERICAN COAST PILOT, 10th edition. THE MERCHANT'S AND SHIP-MASTER'S ASSISTANT, containing informa

tion uscful to merchants, masters of ships, &c. NAUTICAL ALMANACS, from the year 1811 to 1828, both inclusive-to be continu

ed annually. Explanation stereotyped, and English copy corrected. SEAMANSHIP AND NAVAL TACTICS, second edition. WARD'S LUNAR TABLES.

CHARTS: A NEW CHART, extending from New-York to Havana, including Bahama Banks

and Channels, improred by actual surveys of the Cheseapeake Bay, by order of the Navy Department, and of Capes Hatteras, Lood Out, and Fear Shoals, in conformity to an act of Congress of the United States, and conducted under the direction of J. D. ELLIOT, Esq. Capt. in the U. S. Navy, and by permission of Hon. SMITH THOMPSON, Secretary of the Nary, copied, and contains all the Surveys made on the Coast of North Carolina, to the present time (1826.) This Chart has been since improved by a survey from Sandy Hook to Cape May, under the direction of Capt. JONATHAN COLESWORTHY, and EDMUND BLUNT, Hy

drographer. It has also several PLANS of HARBOURS, from actual surveys. DO. of the Mississippi River, extending to New-Orleans, including Mobile, &c. with

sailing directions, and plan of Mobile, on a large scale, from actual survey. DO. of Bahama Banks, from actual survey, made in sloop Orbit, in 1820, with sailing

directions. DO. from New-York to Nova Scotia, extending from latitude 38° N. to latitude 47° N.

longitude 68° W. to longitude 74' W. including the whole of St. George's Bank, improved to August, 1821, by government and other surveys, by which the latitude of the South Shoal of Nantucket was found 22' wrong, and is here, for the first

time, published correct. DO. of the Atlantic or Western Ocean, improved to 1820, with an Analysis of the air

thorities upon which the dangers have been inserted on the Chart. The Tracks extend to the Equator, and are continued on the Chart of the South Atlantịc Ocean. This is the only general Chart extant which has the latitude of the South Shoal of

Nantucket within 22 miles correct. DO. of the South Atlantic Ocean, containing more authentic information than any ex

tant, part of which describes dangers lately discovered, with original plans of har

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States Navy, by order of Commodore RODGERS, and to him respectfully dedicated Repeating Circles ; Brass Sextants, with Telescopes complete, in mahogany cases; Brass Sextants for the packet ; Ebony Sextants ; Quadrants of superior make, with

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Uu

Jack and Pen-Knives of various kinds ; Writing and Letter Paper; Ink and Ink Powder; Lead and Slate Pencils ; Log and Account Books ; Seamans' Journals :-with every article in the stationary line useful at sea.

Also, every Chart and NAVIGATION Book required by gentlemen navigating any part of the globe, it being their sole object to furnish an universal assortment on the most reasonable terms.

DP Compasses, Sextants, Quadrants, Thermometers, Barometers, and Spy Glasses correctly repaired ; and orders left at their store will be punctually attended to by sendo ing for the article, and when repaired, carefully returned. Cash given for second hand Instruments.

Published by E. & G. W. BLUNT, PLAN of New-York Harboʻır, from actual survey, and which may be used with the greatest confidence when a Pilot cannot be obtained, also a second edition of WARD'S Lunar Tables.

Preparing for Publishing, Which will appear at the commencement of the year 1827, a CHART of the Coast of North America, on a Scale, and with such improvements, as are not to be found on any extant.

May, 1826.

NOAH T. PIKE,
Draper, Mercer, and Merchant Tailor,

No. 319 Pearl-Street NEW-YORK, Franklin-Square, Respectfully informs the public in general, that he has constantly on hand (at kis esta. blishment) a choice assortment of fashionable Cloths, Cassimeres, and Vestings, of a handsome variety and taste.

He would, in particular, inform those who may please to favour him with patronage, that his goods are constantly of such variety in style and quality, as is calculated to accommodate his customers with any article of Clothing in his line, suitable for any #season of the year, which he will guarantee to furnish them with at the shortest notice, executed in the most durable and fashionable style, and on the most reasonable terms.

IDP He thus solicits, as he hopes to merit, a generous share of public patronage. April, 1826.

LOOKING GLASSES. The New-York Looking Glass Manufacturing Company, No. 20 Wall-street, respectfully inform Shippers, Country Merchants and the public in general, that they are now ready to supply them with Mantel and Pier Looking Glasses, of every size and rariety of pattern, equal in quality to any offered in this city, and at the most reduced prices. Those therefore, who wish to purchase, will find it to their advantage to call and examine for themselves.

Masters of Vessels, having orders for the above articles, may depend on that punctuality anc: liberality in prices, which will ever give' satisfactior., and the gresiest attention will be paid in packing. New-York, April, 1826.

M. O'CONNOR, Agent. HALF-PRICE BOOK-STORE,

No. 4 South Front-street, PhiladELPHIA. Books in almost every department of literature may be bought at the Half-Price Book-Store, at an average of about one-half the usual retail prices. Scarce and copsright books, which cannot be afforded so low, will, in es cry instance, be sold at the lowest prices. Blank Books, Paper, Quills, Inkpowder, and a general assortment of Stationary.

NAUTICAL BOOKS. Blunt's Coast Pilot, Bowditch's Navigator, Nautical Almanacs, Ship-Master's Assistant, Charts, &c.

Passengers and others, who may want Books to amuse themselves with during their leisure hours, may often buy here such as Novels, Magazines, or other light readings, much lower than half or even one-fourth the nominal prices.

May, 1826.

1

M'INTYRE, Washington Hall, 282 Broadway, corner of

Reed-street, New-YORK, Respectfully informs the public, he is at all times ready to accommodate with BOARD and LODGING private families, and gentlemen who may resort to tbis city for business or pleasure, and with confidence assures them, his establishment is not exceeded by any other in the city for convenience and comfort ; and being in the neighbourhood of the Theatre, Museum, City Hall, and places of amusement, he flatters himself in giving the greatest satisfaction.

May, 1826.

JOHN J. RICKERS,

IMPORTER AND MANUFACTURER OF
PIANO FORTES, &c. AND MUSIC SELLER,

No 187 BROADWAY, NEW-YORK.
Piano Fortes repaired in a very superior stylc.

May, 1826.

WILLIAM H. PRIEST'S
JEWELLERY AND WATCH STORE,
No. 189 Broadway, opposite John-street,

NEW-YORK. A general assortment of Fashionable Jewellery, Silver, Plated, and Britannia Ware, fine Cutlery, Clocks, Watches, and Fancy Articles.

Particular attention paid to Watch Repairing. April, 1826.

MERCHANT TAILORS. ALEXANDER DOUGHERTY & SON, Merchant Tailors, No. 39 South Front-Street, PHILADELPHIA, have for sale a variety of

CLOTHING OF FIRST QUALITY. *** Navy and Army Officers may supply themselves on the most reasonable terms, and with the neatest fashions.

May, 1826.

CLOTHING STORE. ALEXANDER DOUGHERTY & SON, Tailors, No. 40 South Water-street, PHILADELPHIA, have constantly on hand a regular and extensive assortment of CLOTH. ING, where Officers and Seamen may supply themselves on the most satisfactory terufs.

May, 1826.

JAMES B. STANSBURY,

DRUGGIST,
No. 33 Thames-street, Fell's Point,

BALTIMORE, Ilas for sale a general assortment of MEDICINES and DRUGS, of the best qualities, wholesale and retail.

MEDICINE CHESTS of every description for shipping and private families put up at the shortest notice and in the neatest manner. Old Medicine Chests refitted with the greatest care and despatch, with plain and ample directions, and on the lowest terms.

May, 1826.

PETER MCLAUGHLIN,
CHEAP CLOTHING STORE,

No. 59 Pratt-street, Baltimore.
ISP Fine and coarse goods made up and sold at the lowest prices.
May, 1826

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