MKTALLITWY. 





- four time* the electrical 





im are divided, in 



4 the one of alununuti. 



melaU, ml (he other of 



containing not m.. 



in t h one MM UM metal* iiii|*rt * 

 other useful .,.mlit .. * t.. M., n . .,..,. mi., j 



with bra* if not a dm,..-., *.. ^ 

 made now thai du* out contain 



lie eiectnr furna**. M 



ami are sperieily ren^Al 



other the aluminum give* oaeful oualit 



.. alloyed More or l~ 



.-n. titanium, molybde- 



>ag 



[anganeae. nixl tm ihe allot* ail being 

 pure aluminum. It is, however, by on 

 f theee metal*, with perhap* * 

 titimooy, that n 

 vercd. Borne of them have be. 



. U|MIQ 



IIGft* OtWll * *f uliitiiilitil 



the strength of allot* 



u I 

 ml th.< U-l r- 



'hinUahi- 



m.-iit with 



thi* iHo] and oa< it ., in.l v.-i UMJ 

 the equal of good coat iron in strength. 

 in th- I.M-ati.* of the elastic 

 .a fine smooth fin- 

 * read: dull-red 



nui.l. running freely 

 roitie* of the mold, doe* not bum UM 

 M anttaf|4 on in nut dean, M i In good 



of alu- 



<-.. -, 







and that a fluid nW in 



..f an 



in verUoai 



away into 



Uoal stream through a narrow ornte* break, 

 ito characteristic drops and droplrta. The 

 had pictured each water drop* by ftneta*)- 

 plMHograpor.e^lMddoMlheaaatewiiaa 

 Jiold. w hen ho foood 



pi BojAj 



mm OCptlfl 



that the drop* and 



Mil. those of water, 

 -om a height of a foot - 

 dsjoad a remarkable *pla*h. which within UM tenth 



into a columnar 



Hr i- undemood bi ksafJal of | " 



itnl i' u-<. r|*e* oV 



.t free working matrrin: 



.rtliticn \ary much 



fog t jKMiition. As a nil-', the |... 



brass the more dimonh ml a* the 



oompovition nj 



m whine*. These refractory { 

 such classes of material as N 

 braa*. : tn mental to such claase* as clock 



bras- r-l. for \Jn.-h pnqxiee an alloy 



ahould be i HMliu^l which can be worked free at a 

 high speed. The im-tli.*! in most general use for 

 . brass i, lead. 



a* < k brass** 



irill r--l ' f the most 



-d varietie*. Mr. hUlwin S. 

 -tennine the ef- 



f lead In varying <iunntitit in such metal. 

 < t quality of Kcrew-rod or clock 



ry more than 0^0 pr cent, from 9 per cent 

 r should form the remainder. The alloy 

 I be fret- .t least should not <W- 



ora than 0*10 per lira** contain- 



rcadilv than the pu 



'hrathmu' than brass eon- 

 l..r imti-ntiMl by Xuntjt for 

 :* contains M j-nrtH of cop|- 

 of Bine, at"! f lead. Th* invrnt.-r 



:. .:.-..- 



old when they fell'into a pool of molten gold, he 



ffmifut thml 1 1 ov>LI crklAttli VIM! thn ^n^^k t I 



and milk were identwaL When a solid projaotile 

 1 ua. untetl adn*t a steel armor plate with 

 feet par second, the proJectiM 

 produced within one throe thousandth of a second a 



which in turn bore a 

 we re*embUnce to the 

 OM Hence it wa* evident that the solid steel ie*Jl7he> 



BOM 



-r MBIVBMI ..!'.: 1" . rf - 



by experiment* that metals will diffuse into each 



,-...,.,. ...-.. ' 



another, but Ice* rapidly. Theee fact* learn thai 



an whan solid, an not the inert taia*p 

 been supposed to be, bat are really vibrat* 



they haTe been supposed to be 



Bsjpprj 



..ugbt-iron'and steel water mains, that u i. 



.-Mabhhe.l .v >, W ,.trna 



,.trnati..|.. th.t the hfc of 



t: ! 



been SnNhc 



shown that a new 



in t 



>' .-, ..:;- ... ;'7 : . 



.- . > - 



from thirteen to t wvnly^iine 

 fMfaBdl BOM roipoottvaly, 

 fcj 



the all 





ay* a verv important part in 



jeep t) - 



thcr lead ha a tend- 

 brass in any particular pr - 

 BMtt; but 



H A 



- - ' . i' ' ... .: ,". r V .' 



forty years* use have provad valueless even for 



OMOMA ui JLi-iULJt. r.fna }m.iA I.* tk^ AM 



viffWJfTi DOOM wrougni-iroo pipe* law or UM eo- 

 ,e San Franri^ found 



after art* servico to bo OB sound as when 



l.i.l. thnr having been coated with at- 



phaltum. Sleel i^pes have been used in connection 

 mth the Melbourne wat. 

 Bati*factnrr re*ulK .. 



-rd that, with atphaltnm coaUng 

 properly mppUed and pipe* carefully handled, steel 

 pipe* would bat OB long OB cast iron, and be more 



To remove UM iron from the water supplied to 



