Frederick walton. Centenary of the birth of the inventor of linoleum
โ Scribed by Hodgson, R. D.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1934
- Weight
- 726 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0368-4075
No coin nor oath required. For personal study only.
โฆ Synopsis
prncticc the I)nliiiicc is ntljiistetl wliilc in tlic 1111-]oiidcd condition, so tlint with tlic rider nt zero on !.lie scale tlic poiiitcr swings ii1)out it.s zero position. It is gciicrnlly iissuiiieil that ti siiiiilnr bcliiiviour of tho poiiitcr will coiiicitle wit,li cqunlity of loiitl d i c n tlic! halniicc is londctl and will continue to (lo so tliroiigliout. II scrirs of wigliiiigs. Xeitlicr of tlicsc nssiiiiipt,ioiis Iiowcver is jiistifietl. Tlic zero may iilt.cr quite scrioiisly iii piissiiig froiii t,lic unloiitletl to t,lic loadctl roiiditioii ; iiiorrovcr, it clclinitrly uiitlergoes a seculnr change which, witliiii tlic liiiiits of iimiiriicy iiow iiiitlcr coiisitlcriit ioii, iiiiiy lie i i ~i ~i ~~~i i i l ~l ~ iii tlir roiirsc cvcii of i i few coiiscciitivr \vrigliings. 111 tlic prcsciitiiict,liotl the pliiciiig of tlic rider iii t Iic first piirtiiil wcigliiiig hiis t lie ol)jcct, siiiiply of scc:iiriiig n convcnieiit swiiig, iiiid severid iiltcriiiitivc positioiis iiiiiy serve oqiiiilly well ; siniiliirly in t,lic sccoiitl p i r t iiil wcigliiiig. l'roiii tlic rcsiiltiiig swiiigs, togctlirr wit Ii tlic known sensitivity, tlie zero positioii ciiii bc rciidily ciilciilntcd. 'l'liiis, tlir wciglit viiliic which ~ippciirs t i t thc licritl of tlic first coluiiiii in the titl)l(! iiiiiy not Iic known to tlie liist. Iiliice iiiitil tlic ~ceoiicl piirtiiil sveigliiiig is coiiiplctctl. A s i t iii:it,tcr of coiiveiiieiicc thc true zero slioiiltl iiot tlcpiirt, iiiicliily froill t IIP sciilc zero : iiiitl to correct for seciiliir cliiiiigc i i i i occitsionnl rciidjiist iiieiit, of tlic zero will iisiiiilly I J ~ foiiiitl iicrcssiiry.
Tiic ~irecisc viiluc of tlic swsitivity for iiiiy givcii weigliing iiiiiy IJC clccliicctl froiii t Iir deflcctioiis tliiriiig tlic weigliiiig itself. Owing, liowcvcr, to tlic coiistiiiicy of sciisitivity (for ii given loiitl) ovcr co~ii~)ii~iiti.el~ long pcriotls, iiiid to tlic fiict, tliiit, iiiotlcriitc errors iii the sensitivity figure. :ire liirgely eliiiiiiiiitid iii t l i o Coiiriidy systciii, iii roiitiiie \vork, provitlcd tlicrc~ is no swioiis fliict.iiiit ioii of loiitl, id1 tliiit is iiwwsiiry is an occiisioiiiil vwific. 'I t' loll.
The tiiiic otwipictl iii ~vc~igliiiig will iii1tiirdly tlcl)ciiiL oii tlie ridjust iiiciit, of tlic I~iiliiiicc. \Vliilst, soiiic sciisitivity niny oftcii I)c siicilicctl wit Iioiit. IIJSS of' iicciiriicy for grc:itcr spwl, tlict iiiost, siiit:~l)lc coiiiliroiiiisc caii only lie clctcr~iiiiic~il I)y cs1)criiiiciit.. Uiitlcr tlict coiiditioiis represeiitctl liy t Iic cwiiiiplc iii '1'iiI)le J I, whcro i i i i iiicrcriiciit of U. 1 iiig. iiiovrs the iiicxii rcstiiig Iioiiit, 1.5 sciile divisioiis (ii iioiiiiiiiil *. seiisitivity figure " of GO), tlie rivcrrigc! tiiiic tiikcii for one coiiiplcte wigliiiig (four piirtiiil wcigliiiigs) is iipprosiiiii~tcly scviw riiiiiutcs.
Piiiiilly, ii word of criiitioii iiiiiy lie o f Y c w t l iii respect to tlic iveigliiiig iif' cilijccts wliosc dciisit.y difYcrs irj)prccial)ly froiii tliiit of' h i s s , wliicli noriiiiilly constitute tlic bulk of t lie
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