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Show oo ENERGY EXERTED IN PIANO PLAPING ihe weight of music not the weight of the folios on which music Is Pnnted but the actual weight that must be brought to hear upon a pi-ano pi-ano In pounding out , Pj(:P of m'u. ic-is a subject that few musicians ever considered "icians The minimum pressure of the in ger for one note ou the nlano Is em,ai to 110 grammes This experiment ir ahnHrC,arr Cd Ut by Take a handful of pennies and hold them i n a column Immediate! over anv key of the niano and It will be found ; that between nine and twelve pennies are required to produce a sufficient weigh, tor the note to c,,n, three pence are equal to one ounce and one ounce onua to twenty-elahl ETammes. this experiment confirms thfl above calculation. 3 The note, however, will vibrate bul gently, and to be played 'tortlsein o a pressure equal at times 0 grammes is reouired Therefore If t r aKH0f, Vord wo 1,afJ aJ taehed In front of each hamme h(. blow nven on the balance when note is piaved "fortissimo . ouid suffice to lift an object wejhmi more than six pounds. Strange tosa? we bring to bear almo8t a force In playing one note m Snic Ing a chord. i a pressure of Soo grammes be required and f0Dr notn, be struck together, the pressure for -T- . nrwi tmm each nol i en separately equals 500 to "ion grammes What this force represents in an entire piece of music U etartling and F..r Instance, In Chopin's last study in C minor, there Is a passage pas-sage which takes two minutes and j five seconds to play The pressure 1 brought to bear during this short I lapse of time is equal to a grand total M kilogrammes, and would be sufficient I to raise three tons of coal A good I pianist can strike such an enormous ii'iin'i.-i of n. ,,, ,,.- a space M that he can bring to bear a total pres- 1 sure of something like three tons In 1 tow minutes. m In Chopin's "Funeral March ' there ' I ; passage which takes a minute -9 and a half to perform on the piano, 11 el it is only estimated at a ifl I weight of T.S4 kilogrammes. At this II rate it will be seen that it "would j only require four or five minutes to ;1 "' nun" . or one ton. I IT i' 'wo examples given. W I the total tonnage of one hour's plav' v " f?s from twelve to elgbtv four I tons, although selections from Wag- j ner would possibly run it up much higher. j It If rxara 1 . .11 . 1 ; "' "-"".v iu-siii:p to names! Us power and accumulate the store. 1 thp force a pianist, with comparative I I facility, brings to bear, we should j 'have the principle of the kevboard j applied to machinerv, and even the ! 'on Id. in a short time, tap 1 I out of the points or tho ringers force enough io move the heaviest ob- f j stacles. London Tlt-Blts II 1 |