Cocker's Arithmetick: being a plain and familiar method suitable to the meanest capacity, for the full understanding of that incomparable art, as it is now taught by the ablest school-masters in city and country ... / By Edward Cocker, late practicioner [!] in the arts of writing, artihmetick, and engraving. Being that so long since promised to the world. Perused and published by John Hawkins, writing-master near St. George's church in Southwark, by the author's correct copy, and recommended to the world by many eminent mathematicians and writing-masters in and near London.

Edward Cocker

Date:: 1697

Credit: Cocker's Arithmetick: being a plain and familiar method suitable to the meanest capacity, for the full understanding of that incomparable art, as it is now taught by the ablest school-masters in city and country ... / By Edward Cocker, late practicioner [!] in the arts of writing, artihmetick, and engraving. Being that so long since promised to the world. Perused and published by John Hawkins, writing-master near St. George's church in Southwark, by the author's correct copy, and recommended to the world by many eminent mathematicians and writing-masters in and near London. Source: Wellcome Collection.

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$Quejt. 3. A Grocer hath mingled 3 C. of Sugaraaj $65. per C. with 3 C. of Sugar at 3/.445. 08 d. ped C.and with6C.at 11, 175.04d. pr. T detire} to know the price of a hundred weight of that mixx} ture? Anfwer 21.135. 1d. +7. 3. The proof of this operation is by the price o | any quantity of the mixture to fina} Tie Proof of out the total value of the whole comal Alig. Medial. ypofition, and if it is equal to. thad total value of: the feveral fimples, tha?* Work is right, otherwife not. Asin the firft Examip ple, the anfwer to the queftion was that 3s. is tha! price of one bufhel, wherefore I fay by the Rule on}! Proportion, tf 1 bufhel be 3 fhillings,what is 06 bufhess| Anfwer 141, 8 s which isthe total value of the feve-.| ral fimples, wherefore the Work is right. ence Gatemesseens push ntesceneey Ws E Te CHA P: XVIII. Alligation Alternate. r. A Lhgation Alternate is when there are given thee AA particular prices of feveral fimples,and there} by we difcover fuch quantities of thofe fimples,.as be--} / ing mingled together fhall bear a certain rate pro+{ith pounded. 2. When fuch a queftion is ftated, place the givenalit's prices of the fimples one over the other, and the pro--Hii; poulided price of the compofition againft them in fuchh}ix! fort that it may reprefent a Root, and they fo manyy)isi branches fpringing from it as in the following Exampleas iin» Quest. 1. A certain Farmer is defirous to mix 200] bufhels of Wheat at ss. or 60 d. per bufhel, with Ryeelek at 35. or 36 d. per bufhel, and with Barley at 2 s. orrhi 24 a. per buthel, and Oats ati s. 6d. per bufhel, and | fais defireth to mix fucha quantity of Rye,Barly and Oats ; fii with the 20 buthels of Wheat,as that the whole com- Hi); pofition may be worth 25.8 ad. or 32 d. per buthel.. Hii, The § \ !$

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