Page:Cyclopaedia, Chambers - Volume 2.djvu/661

 SAG

M]

S A I

Hames »*d Situation of ^.Longitude the Stan. °a

f O 1 11

Latitude. r n

3

■ 34 n

In the Point of the Arrow 2 42 y8

In the Triangle under? North 22806

the Point X South 3 00 24

Middle and Pofterior 3 33 10

%6 39 43 39 ! 3 39 37 14 °3 3f 3f ° 6 36 3f 02

6

6 6

20 Preced.of 3following rhePoint 4 46 28 Middle 6 29 5-3 Laft ~ 8 37 48

39 18 22

39 n J 8

40 07 17

6 6

Sagitta, in Botany, fignifics the Upper Part of any fmall Twig, Cyon, or Gratt of a Tree.

Sagitta, in Mathematicks, is the fame as the verfed Sine of any Arch, and is fo called by lome Writers, be- caufe it is like a Darr, or Arrow, (landing on the Chord of the Arch. See Sine.

Sagit i- a, in Geometry, a Term fome Writers ule for the Abfcifje of a Curve. See Abscisse.

SAGITTAL SUTURE, in Anatomy, the fecond of the genuine Sutures of the Cranium. See Suture. It reaches the whole Length of the Head ; and has its Name from the Latin Sagitta, as being ftreight, like an Arrow. 'Tis fometimes alfo called Rhabdoides.

SAGITTARIUS, in Aftronomy, the Archer, one of the Signs of the Zodiac ; the Ninth it; Number. See Sign.

The Stars in the Conftellation Sagittarius, in Ptolemy's Catalogue are Thirty One ; in Tycho's Sixteen; In the Jjritannic Catalogue Fifty. The Longitudes, Latitudes, Magnitudes, l$c. whereof are as follow.

Stars in the Conftellation S AG iTTA RIU S.

Names and Situations of ^Longitude Latitude. the Stars. a

Inform, preced. the Bow t 22 yy 01 4 22 42A 6

6 7 6

That in Point of the Arrow

MoreNorth in top of theBow

Subfeq. In handle of Bow agt. Hand yf In the South part of the Bow

22 yy 01

4 22 42A

2f 38 16

19 4fA


 * f 43 "7

47 41A

26 19 47

47 yoA


 * <> ff 47

6 yr yiA

28 54 10

2 2J S4B

29 if °s

2 42 28 B

14 10

6 2f 21A

° 4f 33

10 f9 «A

1 04 J4

7 *4 47A

South, in North part of Bow Preced. the Clara Humeri

jyl.of contig. Stars in theEye

Bright St. in preced. Should. Snbfeqt.of contig. in the Eye yf

Preced. of three in the Head That under the Arm-pit Middle one in the Head Thatund. preced. Shoul. bone

zf Laft of three in the Head Between the Shoulders InNorth part of the C South

Ephaptis of three \ Middle Contiguous to that

3° >.

North of 3 in the Ephapt* In the hind Shoulder Contiguous to that. A Third more North

In the Cubitus of fol. Arm

Thofe folio. theoN.C Preced. part of Ephapt. of2 £ Subfeq.

40 Preced. in South Ephaptis

Treced. in the Root of Tail

4 middle ones in the 5 South

Root of the Tail I North

1 37 40

I f9 ff

y f° 42

7 >9 !& 7 2*^3

7 4r rr

8 09 07 8 iy 09 8 03 12

8 22 14

9 c6 09 9 08 52 9 17 22

10 40 42 10 30

II y6 44

12 43 06

14 02 22

15 08 20

If 06 17

if 21 49 iy 00 19

ly 02 43 if 07 46 iy 39 04

17 24 12

17 31 if

18 28 04.

19 n &

20 20 29

20 37 36 22 06 02

21 29 46

21 ?y iy

22 13 iS

2.& North in South Ephaptis 2. in the Root of the Tail



24 07 49 22 43 30 2y 27 19 26 38 01 v? 26 29 27

2 48 39 B

2 04 01 A

3 f4 3fA

2 39 12B

48 34B

1 01 30 B

09 12 B

1 32 03 B

3 23 32A

12 33B

2 09 2y B

1 42 12B 7 °7 ff A

y4 38 B y 01 12A

1 28 y9B

2 f2 J7A

3 17 y9B

4 >f 43 B 3 48 43 B

6 08 42 B 2 26 17A

2 21 oyA 1 y 4 36A

12 20 B

3 01 53A 3 13 01A

1 y4 04A

f °f f4 B y 11 26B

1 27 02 B 1 y4 03 B

y 22 yyA

6 16 34A y 24 44A

y 08 03' B

7 03 48A

6 f4 32 B

8 44 40 B

7 31 4JB

6 4 4 6

7

7 f 6 3 f

6

4 3

4

4

3 4

f

6

<6

6 S

6

6

6 6 6s

6 6

! f S

SAGUM; in Antiquity, a military Garment wore by the Greeks, Romans and Gauls, in Manner of a Caffock ; covering the Thighs, and fuftaining the Sword. 'Twas made of Wool, and fquare. They had one for the Winter, and another lighter for Summer.

SAICK, or Saiqitc, a Turkifi Veflel, very proper for the Carriage of Merchandizes. It has Iquare Sails on the Middlemaft; without either Mizzen, Top-gallant, or Shrouds: Only a Main mall, with a Maintop-mall, both very high ; with a Bok-lprir, and a little Mizzen. Mad. The Height of the Main mall makes the Saick be leen at a great Dillance. Their Make renders it impofftble for them to go with a Side-wind ; but when they have the Wind behind them, nothing can out-go them. The generality of them carry no Guns.

SAIGNER, in Fortification, a French Term, figni- tying to bleed or drain. Hence to faigner a Moat, is to empty or draw out the Water by Conveyances under Ground, that it may be pafled over the more ealily, after laying Hurdles or Ruflies on rhe Mud remaining.

SAIL, in Navigation, an AflVmblage of levcral Breadths of Canvas, or Cloth of raw Hemp, fewed to- gether by the Lilfs, and eclg'd around with a Cord ; fattened to the Yards and Stays of a Veffel, to make it drive before the Wind which bears thereupon. There are two Kinds of Sails, the one fquare, generally uled in high bottom'd Vefl'els : This has various Names, ac- cording to rhe various Mails 'tis fillened to, as the Main fail, the Mizzen-fail, the Top fail, &c. The other are triangular, called Smack-fails, and by fome Latin- fails, becaufe chiefly ufed in Italy, and in fht-bottom'd Vefl'els ; tho' they are alfo uled on the Mizzen-Mafts and Stays of other Veffcls. They need but few Ropes, and little Wind; but are dangerous, and not to be ufed in foul Weather. There are ordinarily Ten Sails in large Veffels ; which Number is increafed at Bottom by the Addition of Bonnets, and at the Sides by Cafe-fails.

A Veffel is laid to let Sail, to go with full Sail, to make all her Sail, that is, to open all her Sails. To be under Sail, that is, ready to let Sail, &c.

Sails, are alfo the Vanes of Windmills, or the Arms or Flights, whereby the Wind has its Effect on Wind- mills. Thefe are either Horizontal or Perpendicular. See Windmill.

Sails, in Falconry, the Wings of an Hawk aire fo termed,

SAILING, in a general Senfe, is ufed for the Art, or Act of Navigation ; or of determining all the Cafes of a Ship's Motion, by Means of Sea-Charts. See Naviga- tion. Of this there are Three Kinds, Plain, Mer- cator's, and Circular,

'Plain Sailing, is that performed by Means of Rhumbs drawn on a plain Chart. See Plain Chart.

Mercator's Sailing, is that performed by Rhumbs drawn on a Mer eater's Chart. See Mercator's Chart.

Circular Sailiso, is that performed by the Arch of a grear Circle; which, of all others, where practicable, is rhe Jhorteit. See Circular.

TioBrine of Plain and Mer c at o r's-S ai lin g.

Cafe I. The Longitude and Latitude ofTivo Places given ; To find the Departure, or Jlliles of Longitude.

In 'Plain Sailing. i°. If both Places be more Eaflerly than the firfl Meridian, fubtracl the leis Longitude from the greater, the Remainder is the Difference of Meridians. If one of the Places be more Eafterly, and the other more Wcfterly than the firft Meridian, add the Longirude of the more Eafterly to the Complement of the Longitude of the more Weilerly to a whole Circle ; the Sum is the Difference of Meridians. 2 Q. Divide the Difference of Meridians into lb many Patts as there are Degrees in the Difference of Latitude: Or, if the Dif- ference of Latitude be greater than that of the Meri- dians, into fo many fewer. 3 . Reduce the Minutes of Longitude anfwering to one Part, into Miles of rhe fe- veral Parallels, in rhe former Cafe ; or into Miles of the Patallel, which is an arithmetically mean Proportional between the Two, in the latter Cale. 4 . The Aggre- gates of thefe Parts collected into one Sum, exhibit the Departure or Miles of Longitude.

uE gr. Suppofe the Longitude of the one Place 35°. and that of the other 47. rhe Difference of Meridians is 12°. Suppofe the Latitude of the firft 4. and that of the latter 8°. the Difference will be 4", confequently we have failed from the 4th to the 8th Parallel. There- .fore divide 12 by 4, and reduce the Quotient 3°. into Miles in the feveral Parallels 4, 5, 6, and 7. (See Decree) the leveral Quorienti will be -43°. 71'. 43°. 68'. 43°. 65'. 43 . 59'. the Sum of which is 174, the Departure or Miles of Longitude required.

In