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    twelve ^ when it seems to lose the chief part of | ts . vigour * and returns to the number one . : A proof of this may be had by thfc following experiment . Tie a smaiFmetal button to the end of a

    piece of spring ten or twelve inches long , lay tbe ^ other- end of the thread over the end of the thumb , with the nail downwards , so ^ fea ^ the sfcf ^ iig mayJieiip the puke #£ the thumb , and does not touch

    the nail ^ holding it down with the first ^ finger . Let the button hang suspended in the middle of a tumbler glasfc , of a middling size ; to prevent any motion of the arm , Test it upon f he left hand j a vibration of the < button will soon

    commence , and will / gradually , increase itili it reaches the ^ side jq { the glass ; it will then strike" the side as many / times as will collet the hour * and then the vibration toiII as . gradually diminish . But still more minute are the

    indications of - nature respecting the divisions f ) f time ^ for , if the experiment be made between the hours , after , the , hpur has been struck , and the vibration of the button has

    died & way * if the hand be kept perfectly steady , it will begin ^ gain , and with a fainter stroke , count tbesjninutes that are passed $ i « ce . the hour began : thus

    tellmg us , not Qnly the hour but the minute of the day . It is better to b $ ld the liuttou ^ very Ijttle out of ^ e centce of Jtb e glas&j because if it ? ia eica ^ tly ia th ^ cep t r ^ it \ vill strike on , bo ^ h ^ ides . -and the

    rfcl ? 0 rbeira « tion m ^ y occasion a confu ^ ipn ^ Wb ^ tev ^ Tj the hour of the ; d ^ y inay } p $ 9 . this will be found a ^ fajtjtful , indicatpf of it ; so , that ths poor nian ^ witU ft glass tumbler , & . piece , of , thread , and a jtxetal buttQU r may always have ah un-

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    eTORg time ^ piece in his house * perhaps some medical correspondent ntjaygiye you a more scientific solution of th ^ phenomenon than , IiAtn abl ^ to giv e , but I will

    mentioA ^ wliat iias ; suggested itself to my min 4 ^ # ! tvd to which a gentleman of the faculty , a neighbour , seems to , assent . The ^ eis a regular increase in the power of fJaglablood , from the beginning of of time to

    ti ^ liiiaiaral division the eiiftpf it ; so that during the first hourj it is capable of producing a vibration strqng enough only to strike the g lass once ; at the second hour , its force is augmented so that it will strike it

    tvyice ; at the ytbird hour , it has power sufBcienf to stride three times , and thus it discovers a regular increase of force till it has struck twely ^ . It appears that the force of the blood is then

    wound up to its highest degree , from which it suddenly falls again to the lowest , ancl ' thus it continues to proceed uniformly twice rn every revolution of the sun round its axis .

    This idea is corroborated by the well known fact , that , in fevers the heat of the blood increases from one to twelve o ' clock , and after that returns to its lowest heat . J will not venture to

    suggest whether the momentum is occasioned by the he £ » , t , or the heat by the momentum , but they certainly rise and fall together * If lik f the titles the ebb was as gradual as tie flow , the case I refer to would be less astonishing :

    but it certainly stands on a different principle . It is likewise mysterious in what manner this power of the pulse to beat the hour is conveyed ^ tywi } the thread , so as to regulate the numbe ? of times

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    44 © On the Revival of "Knowledge long losf .

• Citation
  • Monthly Repository (1806-1838) and Unitarian Chronicle (1832-1833), Sept. 2, 1810, page 440, in the Nineteenth-Century Serials Edition (2008; 2018) ncse.ac.uk/periodicals/mruc/issues/vm2-ncseproduct2408/page/16/