Show H 1 lays OF pr meran METAL s 11 S lai alk yr the a a dippe difre i inse ikpe arpe in be pr proportions 0 P orti oils pt the tb plo poo e piya d uces aces p a gret gr jaw ina pa t the 0 alloy aught 9 be av abery er Y in pap paper eion on this Ir in ithe be lomo lamo ener alner 0 near has rei rel itly pe been 11 communicated to the alan clester biester ci ester nelana england Eng iani lani 8 ogi e yby by r race nace a ce calvert at ike uhe 40 ta aut borso borao ahia paper app va vasto masto w sto ato present repent samp some thing xe ell eli lable ie n assof alipy ty present sent adopt ed ey for cor pr apara f ave hard bareness ess gohl bohi apts 10 ona one an ani i obo oho kod und the theon haq q bich bibb w bi ico ich scratches scia toes is celato helid he lato to he bf the har bar hardest bardelt deit delt thus fon for or fe when diamond 4 rubbed it JB is aund found t thai the former h ene n e the g ju justly 1 s tty iid ild lid bed hed to t lla lia b the thie hardest hir dest every person erion erlon ia jq fam I 1 lia iia regard to to th the comparative hardness harkness of allise Uie ule stio baies bales hut but very few are acquainted 4 4 sith vieb vi 11 the the comparable hardness har of other bibe hlee bi ee especially tais alloys ys i although a s scala scale of hardness 1 ess ebs lia hia h aa a I 1 long iong an r beer beeri a adopted 9 fe d among pg mineralogists sess seab Seas rs ral rai tal vert made a serles series of af ef wip wit 4 pr y lar aar e masses aass ie of me metai metal a to test their comar comparative tive the f g is 13 i amoul rn ast re vba ahi 3 beel snare pena pre I 1 red d em b p I 1 mio olo 8 i I 4 I 1 p T make mame S pr METALS 1 t i haleness i casar cast iron ste iron f 8 P 1111 hlll ll ll wet wei wyt ti y pw J rw ia A 1 xai kii n ly siever SI Sif ver ven e r afos rf t OS zinc fri rrt yr Y r vit v it Q cadmium ft log low 52 ti cintr 14 r F 27 7 lesu leau r AV an fn this table exhibits the remarkable fact that cast casl iron is harder than ajl 01 theother the other inet metals als ais it was found to be barder harder thail its great resistance to a er oshin osbin force on oti ac ad cohesion anti andt I 1 known deoca its for tar i pf af buildings add and the journal boxes of ija ita heavy vy stationary s the tbt latter how ev ever evar z honi honl 1 always be lined with a soft antifriction alboy Joy i it was found that some brasses were harder than any af q the inet ais als compo composing sing ging them and ana st strahle strange rahle ranle ftp relate thi this sr h hardness hard ard a neBS debs ess is due to the the an alloy of zinc 50 copperi copper 49 40 was in hardress hardness aa as compared with casi cast iron while an alloy of copper as 3 vya was only sonly 1472 in hard bard hardness the abe tact fact wasis wa Salso saiso that when the tb quan quad uan t ity city of 0 zinc z inc shpen saper copper ro er hll iti the i e brass bya s s wak wag was wab Y gry pry brittle A i composed I 1 of I 1 68 copper api 49 52 22 1 y amm aff a mab mad iaac it contain coji taing aba about ut soji per cent ceni mb more fo an ibar 46 t merce and aud yet prepared apa fd it Js jig ric richar brn in calor chich vh ich renders tenders it superior rort fort ori many purposes ipg commercial brass faleo also ou oni account of the softness of teta tata thi tsi e hope Ameri amerl american amerlean can eAn pin L j takei tabei this as a us useful e f u I 1 hine hint L bec because a the pink pini linb bibic which ih make although wan ulan thep theo poldi th d 1 are ar far quality qua y af ne a they do n not ot any strength ith mth they MeA b viki I 1 apie aple a pie ce ce 0 hjad jp pa wire th iba common oll oil augys em 19 ye I 1 ed d T j deap deah tan a hrasc bra ba Vs C 6 zinc 50 as pr 50 50 01 ther gey they ar arlino arfino 0 ha r der F fr soe r heavy be garing boxeur axes u ana 11 ay K p rv jle inck 3 is Q common its hardness lidja y 56 aa wit with cast iro ira aronat nat 1000 1 ap and d Is 1 loj lov 11 lower I 1 F t than h ably akly hV brait b baaso at geas keas 1 in q a B benes senes fes feb e og brodie broi ie 1 a alloys 11 by containing conia conta inin liln ain lin aha wai waa 0 fa o J uri bri castu wa stU caus causby bf sofclis cels nels ceis s fabe an fl copper if is such a mal mai iehle leale aeja t I 1 itte 6 thee anus hijii hi ibi lbs iii inai aff rpY PY 0 t t ai 90 er ann anda 89 79 afif finy is 3 an E ailey i of 30 3 ba 0 c capper pei pel abd hd 65 stef is verl verj brittle brittl es 1 wh wll en thea cop copp p e r T in sift deyto pm ma k e n alloy 1 oy of 84 8 68 c la blui the d and th ohp alloy is i s very han ban it 13 4 pared dahr dt w hr i siron aliw atil in bardt bardl bardness hardness less b n ra f p er ani ad 27 lin tin h lavery nj so ff eink I 1 83 as 0 m p ai d api ap odi zin i J ck is y V i I 1 s har bar 4 t alle Aile 1 I 1 he hc vv viry app osk teresaa ter rest esat 1 13 t v expect expects 81 a because binkis zine zinc L c r thil th il ad tn al loys by copfer copper ad aliz 7 fr a ian an e eca ces 3 of olt lw ie repairs darg ibe he alpy alby al laiso sofiat ff fat fas tat y kyound rould be expected se it i lher iber 4 metal 01 on 01 64 the hand tand all au increased inar ase qu i d M of capper ceope from frn bet but ae that of 0 f j lit of tin 14 anih jb b V ante eup up lp f guatimea gur timea times alche thet them ape quantity f f rh render tb silt dijt i td p oabe foch nature e metals in n their S ym 1 re t J bealin uh dep deh e n nasi s an 66 the tiel tiet lio llo iddle iio e uis his ora m axing iiii bich tile a of th eta eya T eke pt ah smelt tayeh and time lime ime ill in cod yem wem popper ppe ik s zi ren dued dyed h 6 9 d oft dy rapid od soo foo cool 1 I JA 1119 alig aig e iron ap pp ubo QUO ease ses the derx ver aloyis co copper pe ne and become oreter b derfl orey an erg erv ry an iti expand sas sav aas dp 4 we kearly mearly vim rig ali ail all n the fonow fano in binary inary al lb in y ua hely ely qc minith and aha ahr a nil nyi lead tea a and add a I 1 tj nand aid ald J lead baj anti li 1 l J i i mi eil ell ti I 1 if t la I 1 therefore theredo re th tb elanora el anoya should take t U e wa r mold anabe e emin emir eign antly adap im 6 0 orb amenta c 4 merica T 1 w J |