A treatise on calico printing by Treatise

Author:Treatise
Language: eng
Format: epub, pdf

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Of Cikur - Makings

The tisti. genotsd coniideraliioii is, that \£ ft^ condary principles, (ii.) which are coniliciited chiefly of faline and oily parts; and as all the experiments that have been mad^y prove there is iuch a mutual agreement, contie6lion, or depen-dance on one part with another, the knowledge of what fubflances thus agree or difagree, under t%eir various combinations^ ibrm? (as muft be dear to every one, and which has been repeatedly enforced} the foundation of fome certainty in making experiments for any purpofe whatever ; but before that can be known, in rc^pcft to particular fubftances, the- nature of this univerfal :iffeAioH Ihould be conceived, and likewife wbat afc the aflSnities of the different clafles of fab-fiances'which comprehend the fpecies belonging tQ them ; therefore the folio wing poftulata or pcopoGtions received as fundamental truths, (^ihilai; to axioms in mathematick8,or maxims in common life;) and the table or fcheme of affinities which will, afterwards follow, have been formed for th^ purpofe. ^

I. Any

\i\) So deemed its [containing^an analyzation At fubflances more fimple than what they help ^toform» andare yet composed of primary principles*

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T. Anyfubftance having a conformuty with aii^ othtr, ,thc two will unite and iorm one com* pound. ^ ' >

n* All Ample fubftanccs have affinity with each-other^ and will confequently unite; fiich ar water with water, fire withfir^, &c.-

3^ Subftances when^united together Io& {bme of their refpcftivc properties, and the com*

I j[>ounds refulting from their union partake of the properties of thofe fubftances which fcrved* as their principles.

4; The fimpler fubftances are, their affinities are more perceptible r hence it is moft difficult to» analyfe bodies that are the leaft compounded*

5% If to a compound, confiftingoftwofubftwCes^,^ a third be added that lias no affinity wfth one^, butjias a greater wifh the other, than the firfl 2 combined have with each Other, a new de^-compounding,, and a new union muft^ en*-fue*(ii)

(ii) Thus if yeupour vitriolic acid on com* moafidt* thentaerai alkali iuving a gicater attrac* cioft for tbc ntrioUc acid tluui for tbe inarines

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Of Colour - Making.

6« A third fubftance offisned to ^ body confifting of two, no decompoGtion may follow ; but the two uniting with the third, without quitting each other, may form a union of three principles ; prefuming the third fubftance has an affinity^ or nearly equally fo with each oif the Qther fubftances .(13)

7« Though a compound confifting of two fub* ftances, having a greater affinity with each other than with a body prefented to then;!, may not be decompofed by it; yet that body, when combined with another, having an affinity

with

leaves the latter and unites with the former. The vitpolicacid }s alfo faid to have a llronger attraction fpr the mineral alkali than the marine acid has : hence the former acid is faid to expel the lauer from its bails ; or it may be faid deteonftratively thus ; If A being united with C» upon B's being afterwards applied to them^ lets go C and joins B« A is faid to poflefs a greater attradtion for B than C.

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