โ Scribed by Schofield, R. Kenworthy ;Blair, G. W. Scott
No coin nor oath required. For personal study only.
I 1 h piccc of the pliistic n i n s is mndc into n cyliridcr of known radius ant1 Icngtli. !l'liis is pliicctl Iict\vc!cn two pliites, thc upper of which is fixed to onc ciid of :i loiig liorizontnl licnni. 'J'lic Iwatn is pivoted iit tlic otlicr ctitl rind thils allows thc plntc frcc vcrticnl nio~~ctncnt.. 'I'lie lower plntc is niovctl to :ind f f i with sitllicicnt~ nitililitmlc to C ~I I S C thc test cylintlcr to tiirn tit lcrist one coniplctc revolution. It. is found t l i i i t no I>i:rtiirtnetit Ii~ngtlici~itig (and si~iiitltaiicous tliiuning) occiirs utilcss tlic iippcr pliitc is cscrtitig iiiore than n ccrt:iin criticvl stress on tlic test cylinder. 'l'lic in:ichinc is tlcsigiictl to ~~i c n s i ~r e this st rcss.
In the cnsc of I I plnstic which is tiiiitlc lyttiixiiig w t c r or sonic otlrcr liquid with n dry tnntcriril (CJJ., Ilour, clay, ctc.) tlic proport.ion of liqititl ndtlctl is 1111 i~iiportnnt factor. In gcncml if tlic sntnplc is too wct it tcticls to dirty, or stick t o tlic plates of tlic ~n:icIiinc, t i n i l if too dry to cr1111i1)Ic, I)at slioiild tlierc be niiy :iplirccinlilc r:ingc ovcr wliicli the mist urc is ~vorktiblc it is ncccssary citlicr t o fix sonic nrliitrnry conccnt.rrition, or lmttcr still t.o work iilwtiys tit tlic sriiiic tlcgrcc of stickincss. lt'or csritiiplc, with floitr tloiiglts it is tiot tliflicitlt to ninkc up the test; Iiicccs t o t l i i i t moisture coiitciit, :it wlt icli t.hc tlougli will just tiot stick irlian ~irc*ssctl 011 to n &as plntc. Sliglit.lp diffcrcnt critwin will lie ticctlctl for diffcrcnt materinls. 'Clllr Slm 01' 1'111: CY1,Isnlslt l'ltc diniciisioiis of t h cyliiiclw iiiiiy Iw rliosi~n to sit it! tlic circumstances. Lut iiiirst he kiiowti, sinrc tltr critical lord is dircctlp ])~(JpUl-tiCJllii1 both to t h rritliits iuitl leiigtli. The plnstic iti~iss is ciisily fornictl into ti cylindcr of rcl)ro~liicillc rricliirs 11y rollirig i t bctwrwi two picccrr ~o i m ctises it is Iwst to form II pditiiit)ttry rot~glt cylitttlcr by forcing tlic dough tliroiifili IIII orifico or titirrow tul)o.
a1 l ~~! l l ' \ s l ~! ' \ 1 4 c ~s ~~l t l ! ~T l ~s 'L'lict upper pIiit,o is I I I I I ~I ! of glriss so tlirit, Llw snniplc iiiay bc ol)scrvctl tliroiigh it;. Stress is tipplied to tlic test cylititlcr by ri~titiii~g iviitcr froni it lOO-c*.v. IJiIrPttc COXI)ITIOS OF TIIE I'I,.~S~IC rJf \VoOtl Or 0 t h llliltC~ili~, kclit IIllllI% Il? I I I ~i l l l S Of tlt(J])S, nlld U. kllll\Vll ICIlgtll ~1 1 1 1 tllcll C'Ut Olf. 111 * I'iitciiL n~ililic~tl for.
t 1 ~e i t 1 i 1 i 1 i i s t ~~i l I ~~s ~i ~~r i i i i e ~i i ~t i l Sliiticlti, l l i ~r ~~c ~t i ~l c ~i ~,
๐ SIMILAR VOLUMES
and milk prochict niniiufncturcrs hiivc hnd so litd le t o sny nbout the report, for its rccoiiimcndritiotis must affect their futrire opcriitioiis wry consicleriibly. And mennwhilc, to return to the opcning thcme of this article, tlic Government is frnming its policy for the industry-n policy whic
ALng fiirincrs and otltcrs visited the Rotlinmsted Stntion on Wcilncsdiiy, Junc 28, iuitl nintlc u tour of tltc cspcrinicntiil farm plots. 'l'hc visitors included rcprc- scntcitives from scvcrnl foreign countries who were gliid to scc so tiiiiiiy intcrcsting fcnturcs. Tlicrc wns an inspcctioii of th