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SE ee a SYSTEM CHEMISTRY, annette ese eeeeen aaa cera PU RTC SYSTEM nie “PAB oF CUEMISTRY. vchic!s we rotmed un the Vegetable and Ammul Systems, aid which we to be the sabe 4 compounds. svt the nugute of thar chemi & constuntion, diey dee vcore consideration inthis value, are exe jrculiae chars tes, by which they we connected with each other, and ave diserumb.:*ow from the come pourids which beloug ta the munetat Kinga m, Warh regard re composition, the mineral subsanees are cairymely varied ap to ie puinuptes of which they are composed, but sungle as to ube mules in which these are combine All he simple subsrnees are tobe found inthe mine Kingdom, but they ate geoealwit g binary combinations, oF, by the w: pounds, others are formed, Th! hand, which are formed in haat toms, are mote uniform with regord to tha incipbn C7 WhLD they are compoved, but mote diversiGed in the Tr" oF cHnMserty fhich thee are combined ; théy consist only of Pants, which are united scarcely ever in binary, ternary, quaternary, ot even more-compli=« nitly diver seed; AN ots may by said to consist of carbon, al, of catbeny | prog oxygen, H@%.goa, phosphor, und sulphur, Some of the metals and earths, partieniatly iron, manganese, gull, b+ Jez, and Iifne, and the fixed alkalis, sre tikew ee obviined. from vegutsble and animal bodies. But the quantities of some of them urs perhaps -hete ara seldom considerabt Formed during the ysis by which they ae of and others may be regarded as forcign substances a ci dentally introduced. Lirw ond iron are of these p ples the most cunston!, andl present ins largest proportiy: From the ature uf the composigen of hie substan. ces, arise the chemical prapertics by which rhey are cae metetized, The compounds of the atineral Kingsto-:, consir ing, in general, of two immediate principles, united by a single affinity, have no tendency to suffer spor neous changes; ot, when left to themselves, there i na ‘eaube to dissurb the uniformity of dwic mutual ufte-etion, he relative force of ateract united, can also be in some measure estimated, and 3 secant by which that attraction is malified etermined Haze, By preventing theve principlesto each sother und these cireumstances, we cat effect their oome Sinationy'dr Form cqumotnds possessed of precisely the same properties, | Werean analgee these compounds yh in by which eheir pris.sples ofeTRM OF CHEMISTRY. 8 qual facility, or, by a simple decomporizling separate’ their principles, so as to obtain them, isolated. "We can’ therefore ascertain with accuracy theis competion, hath as to the nature and proportions of their cenetitnyrr pt ts, an a3 to the modes in which thete afe capbennt , But the chemical constitution of the vegege's Yani- mudd products is extremely different, and gives {Je to vasy ditirent ckcmical characters. As they always consist of three or more principles, whith have strong. enutual at« aractions, rhe balance of these attractions, whence any easily subverted ; the prin ciples have a perpetual tendency to te-att ou each other, and enter into new combinat:ons,—a tendency renééred Aicheal wy the shghtest alterabon of circumstances. TTenve arises che facility of decomposition which is cbae acteristic of these bodies : they ate tiuble to spontaneous pittuular compound exists, “Thaugess fermentation and puir.Fact'on > they ave xeadily acted on by other agent, as by w Wer or atmospheric air 5 and they ate totally changed by an imerease of temperae ture. As their principles, too, have mutual affinities of nearly the same force, they never escape from 4 come bmauon pure and uncombined, but unite with each other, Forming a coiphcated analysis ; anil as their composition, woth regard to the ultimate ptinciptes, is much alike, the , in the differont individual sube stanees, are catremsly similas, Aad, Instly, a¢ we ate ineapable of bal nung the attractions of the septral ptléar cipks 6f wlach chey ate formed, or of placing these psin- ciples under the cieumstaneys umder which they were ropght into union io the veescls of the ankmat or plnut, Ag products of thi, analy.