Storer on the Alloys of Copper and Zine. 423 
may then be “gk by Lip the triethylamin boiling at 91° C. 
and the ether at 260° C. The two oxamates may then be decomposed 
by caustic potash and yield the pare alkaloids.—Zeitschift fiw dhe 
und Pharmacie, 1861, Heft. w. 
Tenn CHEMISTRY, 
2 the nee of Copper and Zinc; by Frank H. Storer. (Con- 
cited om p. 289.) 
whic e specimens of it exhibit to o friable, after an pare re of longer 
or shorter d on to sea-water, that the s shusets m il roken in pieces, 
met n be he fingers. Attention has ly bee ed to this 
: D ca 
subject. by eee ae cea refer such ees more toes | to chemical 
conditions depending, as thinks, upon the too great proportion of zine which is 
used in the preparation of ie alloy, salou aeeas as well as to changes of compo- 
sition produnas by hot rolling. 
I cannot agree w with this  conelusion, In my own opinion, the other alternative 
which Bobierre has suggested, namel uliar arr: rrangement t of the molecules | 
i i a diffic 
manufacturers more scrupulously than t 
“Tt must also be borne in mind, that, ‘of the enormous quantity of yellow-metal 
Ai + 
of which is composed of sixt ater ea of copper and forty parts of zine, and rolled hot, 
portion passes into the friable Selick to which I 
have alluc ed. 
e portion whi hich remains eae cde wear of Fsveral yeas is sail tia : 
Teaa. the absolute ean of sheathing whi ch beco piped is e ntirely out 
a 
be in every instance en ce gtian SS ae by methodically annealing or temperin 
sheets of alloy in such a man ee no fibres could form i n them, and that for 
structure should be homogeneo 
ierre in his able thesis, to baal x oth eee A alluded, has urged that 
it would be well to digneetians the use of the alloy containing 60 per cent of copper, 
which admits of being rolled hot, and to satatlnge for it stenting abe from 
perc rage about 66 per cent of copper, which can o! prepar a most 
us process of cold rolling. It is true that the fibres ice I have described 
would i in this tate probably never be encountered. Still several important 
* Théses ee a la Faculté des § Sciences de Paris. i 
Thése de Physique: Des Phé sont ] ag erty 
les eR ae : Imp. Busse 
Mer, des Aihages enpegies pour doubler 
185: 
Tt “ivhenever the destruction of a portion of the geet ing requ a ship be hauled 
up pairs, it is customary, since this operation is ane ensi mare oe i resheathe the 
vessel entire! igi for as the —o sheets are interspe! the others, and since all 
the shee a one would variate sae of ng ne being repairs, 
pean the owner of pire a entire phoat! s being worn te, 
Br oncyey aess ion of the durability of yellow-metal in accurdance with this view 
Aw. Joug. Scr.—Szcoxp — Vou. XXXI, ‘No. 93.—May, 1861 
55 
