I N T 



and'agitated mind, when properly ufed, operate upon us by 

 means of fympathy. Hence it follows, that the great rule 

 with regard to fuch figures is, that the writer attend to the 

 manner in which nature dictates to us to cxprefs any emotion 

 er paffion, and that he give his language that turn and no 

 other ; above all, that he never affedt tlie ftyle of a paffion 

 which he does not feel. Interrogations may be ufed with 

 freedom ; but nothing has a worfe effect than the frequent 

 and u:>!eafonable ufe of exclamations to which raw and 

 iuvenile writers are addicted. They render compoCtions 

 Vrijjid to excefs. 



Interrogation, in Grammar, is a point which ferves 

 to diilingiiu'h fuch parts of a difcourfe, where the author 

 fpeaitsas if he were aficing qiiellions. Its form is this (.'), 



INTERROGATORIES, in Lctu, are particular 

 queftions demanded of wirnefFes brouglit in to be examined 

 in a caufe, efpecially in the court of chancery. And thefe 

 interrogatories mud be exhibited by the parties in fuit on each 

 fide; which are either direft for the party that produces 

 them, or counter on behalf of the adverfe party ; and ge- 

 nerally both plaintiff and defendant may exhibit, direft, and 

 counter or crofs interrogatories. They are to be pertinent, 

 and only to the points neceffary ; and either drawn or per- 

 \ifed by counfel, and to be (igned by them. See Co^^f- 

 r.n»sios to examine 'ZviliiT^es, and EXAMINATION of nvilntlfa. 

 Seealfo Contempt. 



INTERRUPTED Suture, in Surgery See Su- 



TUJiE. 



INTERRUPTION, in Matters of Prttporilon, denotes 

 t!ie fame with disjuv.Hwn. 



It is noted thus (:: ), and fignifies' the breaking off of the 

 ratio in the middle of four disjunct or difcretc proportionals : 

 as A : B :: C : D ; that is, as A is to B fo is C to D. 

 See Ratio, Proportion, &c 



Interruption is alfo a figure in Rhetoric, wherein a per- 

 fon breaks off his difcourfe fuddcnly, to (hew fome paffion. 



INTERSCENDENT, in ^/-.-ira, is applied to quan- 

 tities, when the exponents of their powers are radical quan- 

 tities. Thus 7."'', z/"', &c. are interfcendent quantities. 

 See Function. 



INTERSECTION, m Mathematics, the cutting of one 

 line or plane by another ; or the point or line wherein two 

 lines, or tMro planes, cut each other. 



The mutual interfeclion of two planes is a right line. 

 The centre of a circle is in the interfedion of two diameters. 

 The central point of a regular or irregular figure of four 

 fides, is the point of interfedion of the two diagonals. 



The equinoxes happen when the fun is in the interfeftions 

 of the equator and the echptic. 



JNTERSOILING, in HufbarJry, the laying one kind 

 of foil, or mould, upon another ; as clay on fand, fand on 

 «arth,'&c. 



INTERSPERSUM Vacuum. See Vacuum. 



INTERSPINALES, in Jnatomy, are fmali mufcles 

 placed in the intervals of tiie fpinous proceffes of the ver- 

 tebrse, and diftinguifhed as belonging to the neck, back, or 

 loins. 



Interfpituiks colli, interfpiniens, epineux du coo, are 

 arranged in pairs, as the proceffes, to which they are con- 

 netted, are bifurcated. There are fix pairs, of which the 

 firfl is placed between the fpinous proceffes of the fecond and 

 third cervical vertebras, the fecond between the third and 

 fourth, and fo on to the fi,>:lh, which is found between the 

 lall cervical and firft dor'.al vertebra. Their furfaces are 

 flattened, and they have fome refemblance to lengthened 

 f<juares ; 6ii the outfide, they are in coutaift v.'ith the mulli- 



I N r 



fidus fpina ; on the infide, the two mufcles eotnpofing the palp- 

 are in contad ; their upper and lower edges are fixed to the 

 fpinous proceffes whicli bound the intervals containing them.. 

 With the exception of a few fhort aponeurotic fibres at their 

 extremities, they are entirely tlefliy. By approximating the 

 fpinous proceffes, they extend the cervical portion of the 

 fpine. 



Interfpinaki dorfi, epineux du dos.' Small mufcles^ 

 are fometimes placed between the fpinous procefies of the- 

 lower lumbar vertebrse ; but they are more frequently ab- 

 fent. 



Interfpinales lumborum, epineux des lombes. Thefe 

 are fix in number, ftldom deficient, tendmous at their ex- 

 treir.ities, and attached above and below to the fpinous pro- 

 ceffes of t'.ie lumbar vertebn. They are covered at the 

 fides by the niultifidi fpinse. The fiiit is placed between the 

 twelfth dorfal and firft lumbar vertebra ; the fixth between 

 the laft lumbar and the facrum. They produce in the loins 

 the fame effeft as the correfponding mufcles do in the neck. 



INTERSTELLAR, a word ufed by fome authors to 

 exprefs thofe parts of the univerfe that are without, and be- 

 yond, the limits of our folar fyftem. 



In the interfteilar regions are fuppofed to be feveral other 

 fyflems of planets moving round the fixed flars, as the cen- 

 tres of their refpeciive motions ; and if it be true, as it is 

 not improbable, that each fixed ftar is thus a fun to fome ha- 

 bitable orbs, that move round it, the interfteilar world will be 

 inn;iitely thegreatell part of the univerfe. 



INTERTIES, or Interduces, in Architeaure, thofe 

 fmall pieces of timber which lie horizontally betwixt the 

 fumniers, or betwixt them and the fell, or raifing plate. 



INTERTRANSVERSI, in Anatomy, or interiremfver. 

 farii, or intertranfjtrfalts, are fmall mufcles belonging to the 

 fpine, placed in the intervals of the tranfverfe proceffes of 

 the vertebrae, and diftinguiihed in the different regions of the 

 fpine by the additional terms of colli, dorfi, and lumborum. 



IntertranJverJ- colli, intertranfverfiens, petits tranfverfaires- 

 du col. Thefe mufcles are diftinguifhed into anterior and 

 pofterior, as the tranfverfe procefies to which they are at- 

 tached, are bifid at their ends. The anterior ones are fix 

 in number ; the firft is placed between the tranfrerfe pro- 

 ceffes of the firft and fecond vertebra, and the fixth between 

 thofe of the fixth and feventh. They are flattened in their 

 figure, and the firit is longer than the fucceeding ones. On 

 the front, they are covered by the reftus capitis major an- 

 ticus ; behind, they are in contaft with the anterior branches 

 of the cervical nerves ; their upper and lower margins are 

 attached to the tranfverfe proceffes. 



The pofterior inter- ran fverfi are five in number, the firfl 

 being placed between tlie tranfverfe proceffes of the fecond 

 and third vertebras, and the fifth between thofe of the fixth 

 and feventh. They very much refemble the preceding 

 mufcles. They cori-efpond in front to the anterior branches 

 of tlie cervical nerves, and are covered behind by the fplenius, 

 tranfverfalis colli, and facrolumbahs. Their margins are fixed 

 to the tranfverfe proceffes. They are almofl entirely flefhy. 

 By drawing the tranfverfe proceffes together, thefe mufcles 

 will infledt the neck laterally. 



Jntcrtranfverfi dorfi, petits tranfverfaires du dos. Thefe 

 refemble in the back the correfponding mufcles of the loins, 

 but are fmaller ; they are placed between the points of the 

 tranfverfe proceff'S. Some of the lower ones are of a con- 

 fpicuous fize ; they become gradually more flender and ten- 

 dinous, and, in the up;-:cr part of the bick, appear more 

 like thin tendons than mufcles. In the latter fituatioo they 

 often do cot exiil la front ihev lie on the iiiterco(!al 



liiufclea. 



