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(5) In latitude 31°, the departure made good was 12 miles.

Required the d.long. by parallel sailing. (6) Required the course and distance, by Mercator's sailing,

from A to B.

A-Lat. 16° 34' S. A-Long. 169° 45' E.
B-Lat. 24 35 S. B—Long. 174 56 W.

ADDITIONAL FOR ONLY MATE. (7) 1870, February 17th. Find the A. M. and P. M. tides

at Blyth, Hull, and Ipswich. (8) 1870, May 7th, at 5h. 30m. P. M. apparent time at ship,

in latitude 24° 17' S., longitude 75° 45' E., the Sun's observed magnetic amplitude was W. 7° 29' S. Find the

variation. (9) 1870, October 30th, P. M. at ship, in latitude 55° N., the

observed altitude of the Sun's 1. 1. was 12° 46', height of the eye 20 feet, time by chronometer 30d. 9h. 56m. 20s., which was slow 3m. 178. on mean time at Greenwich, on June 20th, and losing daily 3s 2. Find the longitude by chronometer.

ADDITIONAL FOR FIRST MATE.

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(10). 1870, January 10th, mean time at ship 3h. 46m. P. M.,

in latitude 35° 20' N., longitude 30° 45' W., the Sun's bearing by compass was S. 70° 20' W., altitude of the Sun's I.1. 11° 31', height of the eye 14 feet. Find the

variation. (11) 1870, February 4th, P. M. at ship, in latitude by account

42° N., longitude 30° E., the observed altitude of the Sun's 1.l. near the meridian, South of the observer, was 31° 37'10", index error + 1' 10", height of the eye 16 feet, time by watch 4d. 2h. 17m. 5s., which had been found to be 2h. fast on apparent time at ship, but since the error was determined the d.long. made to the W. was 20 miles. Find the latitude by reduction to the mer an.

ADDITIONAL FOR MASTER. (12) 1870, July 6th, the observed meridian altitude of the

star Fomalhaut was 46° 52', bearing S., height of the eye 16 feet. Find the latitude.

PAPER IX.

FOR SECOND MATE.

(1) Multiply 90 by 25, by common logs.
(2) Divide 8410 by 396, by common logs.
(3)

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1 W. by N. 7 2

7 3

7 4

7 5 SW. by W.! 6 6

6 7 8

6 9 N.N.E. 10

5

5 12

5 1 W. S.W.

5 2

6 3

6 4

6 5 NNW.ZW. 6 6

6 7

6 8

7 E.S.E. 7 10

7 11

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(4) 1870, September 5th, in longitude 150°40 W., the observed

meridian altitude of the Sun's l.l. was 60° 30' 7", bearing S., index error + 4' 13”, height of the eye 23 feet. Find the latitude,

(5) In latitude 31°, the departure made good was 12 miles.

Required the d.long. by parallel sailing. (6) Required the course and distance, by Mercator's sailing,

from A to B.

A-Lat. 16° 34' S. A-Long. 169° 45' E.
B-Lat. 24 35 S. B—Long. 174 56 W.

ADDITIONAL FOR ONLY MATE. (7) 1870, February 17th. Find the A. M. and P. M. tides

at Blyth, Hull, and Ipswich. (8) 1870, May 7th, at 5h. 30m. P. M. apparent time at ship,

in latitude 24° 17' S., longitude 75° 45' E., the Sun's observed magnetic amplitude was W. 7° 29' S. Find the

variation. (9) 1870, October 30th, P. M. at ship, in latitude 55° N., the

observed altitude of the Sun's 1. l. was 12° 46', height of the eye 20 feet, time by chronometer 30d. 9h. 56m. 20s., which was slow 3m. 17s. on mean time at Greenwich, on June 20th, and losing daily 35.2. Find the longitude by chronometer.

ADDITIONAL FOR FIRST MATE.

(10) 1870, January 10th, mean time at ship 3h. 46m. P. M.,

in latitude 35° 20' N., longitude 30° 45' W., the Sun's bearing by compass was S. 70° 20' W., altitude of the Sun's 1.1. 11° 31', height of the eye 14 feet.

Find the variation. (11) 1870, February 4th, P. M. at ship, in latitude by account

42° N., longitude 30° E., the observed altitude of the Sun's 1.1. near the meridian, South of the observer, was 31° 37' 10", index error + 1' 10", height of the eye 16 feet, time by watch 4d. 2h. 17m. 58., which had been found to be 2h. fast on apparent time at ship, but since the error was determined the d.long. made to the W. was 20 miles. Find the latitude by reduction to the meridian.

ADDITIONAL FOR MASTER. (12) 1870, July 6th, the observed meridian altitude of the

star Fomalhaut was 46° 52', bearing S., height of the eye 16 feet. Find the latitude.

PAPER X.

FOR SECOND MATE.

(1) Multiply 276 by 7, by common logs.
(2) Divide 4091 by 396, by common logs.
(3)

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1 N. 4 7 W.N.W. A point of land in 2 4 6

lat. 17° 52' N. 3 5

long. 76° 28' W. 4 2

bearing by compass 5 N.E. by N. 4 4 N.W. by N. I E.S.E. 6

Dist. 17 miles. 7 8

4 9 W.N.W. 4 7 N. 10

4 9 11

5 2 12

5 2 1 S by W{W 5 4 N. by E.

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5 1 3

5 5 4

5 5 E.S.E. 4 7 N.E. } A current set the 6 4

ship by compass 7 4 6

N.W.IN. 8

4 8 9 E. 4 6 S.S.E. À Dist. 24 miles from 10 4

the time the depar11 4

ture was taken to 12 4 2

the end of the day. (4) 1870, November 1st, in longitude 40° 30' E., the observed

meridian altitude of the Sun's 1. l. was 50° 6' 40", bearing S., index error 1' 20", height of the eye 19 feet. Find the latitude.

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(5) In latitude 32° 19', the departure made good was 130 miles.

Required the d.long. by parallel sailing. (6) Required the course and distance by Mercator's sailing,

from A to B.

A-Lat. 37° 44' S. A-Long. 49° 51' W.
B-Lat. 49 14 S. B—Long. 39 16 W.

ADDITIONAL FOR ONLY MATE. (7) 1870, March 29th. Required the A. M. and P. M. tides at

Dublin, Sheerness, and Peterhead. (8) 1870, June 8th, at 4h. 27m. A. M., apparent time at

ship, in latitude 43° 16' N., longitude 167° 30' W., the Sun's magnetic amplitude was East. Find the true amplitude

and variation. (9) 1870, November 15th, A. M. at ship, in latitude 17° 14' S.

the observed altitude of the Sun's 1.l. was 30° 15' 15", index error + 3' 10", height of the eye 17 feet, time by chronometer 14d. 20h. 13m. 16s., which was fast 17m. 21s. on mean noon at Greenwich, on the 26th August, and gaining daily 48.5. Find the longitude by chronometer.

ADDITIONAL FOR FIRST MATE.

(10) 1870, February 14th, at 7h. 18m. A. M. mean time at

ship, in latitude 26° 29' S., longitude 60° E., the observed altitude of the Sun's l. 1. was 22° 55', height of the eye 15 feet, bearing by azimuth compass S.E.E. Find the

variation. (11) 1870, March 17th, P. M. at ship, in latitude by account

15° N., longitude 145o W., the observed altitude of the Sun's 1. 1. near the meridian, South of the observer, was 71° 7' 40", height of the eye 19 feet, time by watch 11h. 46m. 378., which had been found to be 49m. 54s. slow on apparent time at ship, but since the error was determined the ship has made 153 miles d.long. to the E. Find the latitude by reduction to the meridian.

ADDITIONAL FOR MASTER. (12) 1870, September 21st, the observed meridian altitude of

the star ß Aquilæ, bearing S., was 56° 47' 10", height of the eye 20 feet. Find the latitude,

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