GLOBE. 



<Ui- : in tlie prcfcnt inftancc Capella pafTcs about 6 (.'clock 



in the aflcrnooii. . ,. , , /- < A„rl- 



2 Find under xvliat m.r.dian thoy reckon fi o clock 



ts.hf'n it is 10 with ur, Nvh.ich will be four lunn-s to the 



^^\l Obferve under this meridian the place ;vhofc latitude 

 i, equal to the declination of the liar, which, n, this example, 

 is nearly 46 : and this place, which is near Louiibiirg, m 

 North America, will be the place required. 



To f.v/./.;.'n theph^mtna of thv kirvjl-moon by the globe, lee 



Globe, Terrcjlrlil,h an artificial fphere, on whofe furface 

 arc delineated the principal places of the earth, m their pro- 

 per fituations, dillanees, &c together with their circles 

 imai^ined on the fr.rface of the tervellnal fphere. 1 he 

 ufe of the terrelh-ial globe, is to exhibit the fevera affcftions 

 and phenomena of the different places of the earth, depend- 

 in-T on magnitude, fee. in an cafy obvious mamier, without 

 the trouble of trigonometrical calculatuins. _ 



Globe, To .»,>•«.? ^ /.rr.y/^vW.-The contraction of a 

 terreftrial globe, whether ot metal, plalVer, paper, &c.. is 

 Ihe fame af that of a celellial. The fame circles are deli- 

 neated on both: and as for the places, «.. cities, towns, 

 &c. they are laid down from the longitudes and latitudes 

 ^iven, as the Ihirs arc from their right afcenfions and dcclina- 



""tlence all problenvs depending on the circles, may be 

 equally wrought on either globe; as the afcenfions, dcleen- 

 fions, amplitudes, a/.imuths, rifings, fcttings, altitudes, &c. 

 of the fun ; the lengths of day and night ; hours- of tlie 

 day and nigla v crepufcula, c;c. _ ,■ . .1 



We {hall here, therefore, only give what is peciihar to the 



teiTcftriiil ""lobe. , , . i t 



Globe, Ufe of ihe UrreflnJ. To f.d //:. lo„^>tuds and 

 hlU„.le of any piece Mnnitcd en the ^A>f..-Bnng the place 

 to the graduated fide of the brafs meridian : the degree of 

 the mendian it cuts is the latitude required ', and the degiTC 

 <,f the equator, at the fame time under the meridian, is tlie 

 longitude required. 



■he hn-Alude and hu'.ude pven, to frJ the plucv on the globe. 

 —Seek, "in the equator, tire given degree of longitude, and 

 brincr it to the meridian : then coimt from the etiuator on 

 the meridian the degrees of latitude -iven, towards this or 

 that pole, as the latitude is either north or louth : the point 

 under this is the place required 



tlie hours remaining : thus will tlie place vequii'cd be und*r- 

 the point of the meridian before noted. 3. If the hour he 

 after noon, turn the globe in the fame manner towards the 

 well, till the index points at the given hour : thus, again^ 

 will the place required be found under the point of the meri- 

 dian before noted. 



Ill IJt-lUlL 1IV^L\-Vi. 



If, at the fame time, yoj note all the places which are 

 under the fame half of the meridian with the place found, you 

 will have all the places to which the fun is tlien in the meri- 

 dian ; and the oppofite half of the meridian will fliew all the 

 places in which it is then mid-night. 



tteeb 111 XNltl^U IL 1? IIIV II I111V»-11I^ !J W. 



A place beiii;; giv^n in the torrid z,one, to Jisd the tiuo days ht 

 e year -wherein the fun is •vertical in the fame — i. Bring the 



The hour bein^giv-n at anyplace, to fnd it'hat hour ,1 :s m 

 «„V other part "of the ..■«■/./.— Bring the given place to the 

 meridian, and fet the hour-index to the given hour ; then, 

 bv turning the globe, bring any place to the meridian, and 

 tlie index will point to the hour of that place. 



To find the antteci, periicci, and antijyjdes of any place. — 

 I The o-lven place being brought to the meridian, count as 

 many degrees on the meridian from the equator tov/ards 

 the o'her pole : tiie point which is thus arrived at is the 

 place of the antocci. 2. Note the degree of the mendian 

 over the given place and its antccci, and turn the globe till 

 the opDoflte degree of the equator come under the meridian ; 

 cr" wh'ch amounts to the fame, till the index, which before 

 l^o'od at twelve, come to the other twelve : then will the 

 place, corrcfpoiiding to the former degree, be the periocci ; 

 and tiie latter, that of the antipodes. 



'To find what pLice of ihe earth the fun u. verttca! to at any time 

 ^ij'ilLli. liring the fun's place found in the ecliptic to 

 the m.eridian, and the index to the hour of ti<Vlve, noting 

 what point of the meridian corrcfponds thereto. 2. If the 

 .riven hoar be before noon, fubtraa it from twelve hours, 

 Snd turn tU^' glubi' towards the weft, till the index points at 



111 



irjc jcci, -^u^,^,,. ...^ J,.: .^ - fame — i. Bring the 



given place to the meridian, and note the degree of the 

 meridian correfponding thereto.. 2. Turn the globe about,, 

 and note the two points of the ecliptic paffiug through that 

 degree. \. Find on what days the fun is in thefe point:' 

 of the ecliptic : for on thofc days he is verticaJ to the given 

 place. 



To find ihofe places in the torrid •z.one to 'which the fun is ver- 

 tical on a ^iven day. — Bring the fun's place in the ecliptic to 

 the meridian ; then turning the globe round, note all the 

 places which pais through that point of tlie meridian : thofe 

 are the places required. 



After the fame manner may be found what people are 

 afcii for any given day. 



2'he day and hour at any place being given, to jiiid luhere the 

 fun is vertical at that hour. — Bring the fun's place to the 

 meridian^ and the degree over it is- the fini's declination at 

 that time ; then bring the given place to the meridian, and 

 fet the index to the given hour ;. turn the globe till the index 

 points to twelve at noon, and the ph.ce on the globe which 

 lies under the degree of the fun's decimation lias the fun then, 

 vertical. 



yl place being given in the frigid -zone, to find the time 'when 

 the fun begins to appear abcve the Z'a/'iis,?, and ii'henit btgins to 

 df appear ; andalfo tke Lng.'h cf ihelongej} day or night in that ■ 

 place. — Reftify for the latitude ;. bring tlie afceiiding j^art 

 of the elliptic, /. e. for latitudes north of the tropic of 

 Cancer the femicircle intercepted between Capricorn and 

 Cancer, to the fouth point tii the horizon j; obferve the 

 degree ef the ecliptic which cuts that point, and find when 

 the fun enters tltat degree,, and tliis wilLgivj the time when 

 the fun begins to appear in that latitude. Bring the de- 

 fcending part of the ecliptic to the fame point of the horizon, 

 and the calendar will {liiw when the fun leaves that latitude 

 and difajipears. Again, bring the afcending part of the 

 ecliptic to the north point of the horizon, aiid the degree, aS: 

 before, will lliew in the caUndar uhen the longell day be- 

 gins ; and by bringing the defcending part cf the ecliptic- 

 to the fame north point, we Oiall find, in the fame manner, 

 when the longeft day ends. 



To find the latitude of the places 'wherein any given day is of 

 nn'i given length. — I. Bring the fun's place for the given day. 

 to tiie ecliptic, and !et tlie index to the hour t>f twelve. 

 2. Turn thu globe, till the index points at tlie hour of rifing or 

 fetting. 3. Raife, and dcprefs the pole till the fun's place ap- 

 pear in the eallern and weftern fide of the horizon : tlien will. 

 the pole be duly elevated, and, confcquently,. tlie. latitude - 



To find the latitude of thofe places in the frigid acni iwhere 

 the fun does not fet for a given number of days. — I. Count fo - 

 many degrees from the next tropic, towards the equinoftial, 

 point, as there are units in half tlie number of the given 

 days ; becaufe the fun, in its proper motion, goes nearly, 

 a degree every day. 2. Bring tlie point of the cchptic, 

 thus found, to the meridian ; and ita diilance from the pole 



w,ill 



