54 Scientific Intelligence. 
an acid isomeric or identical with the benzoylbenzoic acid of 
Zincke. From these experiments, Staedel concludes that the for- 
mation of ketones by “ene ng the calcium salt of an organic acid, 
takes place in two stage In the first, O ca* from one molecule 
unites with H from ‘he: other, the two residues thus produced 
uniting together thus: 
*F{:CO Oca C,H CO Oca 
C H,°6O" — ae RO ss 
a eves C,H,.CO 
In the second the calcium hydrate reacts upon this calcium salt, 
producing the ketone and calcium carbonate, thu 
oll 
C,H,.CO Oca C,H 
: +HOca= : * +-CaCO,. 
C,H,.CO C,H,--CO 
In the case of anthrachinone, a repetition of the first stage is 
observed, however, the second O ca uniting with another H, thus: 
iH caO CO rere) 
CH ps Oj C.H,. 
Hi CO 
a 
C,H,CO ‘Oca 
If this view of the formation + peated = Bsa the ketone 
of a substituted benzoic acid must nsymm a constituted ; 
the ketone obtained by the dry distillation oalait salicylate 
for example, yielding, on fusion with potassium hyde a mixture, 
besides phenol, of oxybenzoic and salicylic acids. The author is 
engaged in preparing a dioxybenzophenone synthetically, with 
which to test this question, by comparing it with the ketone pro- 
duced as above.— Ber. Berl. Chem. Ges., vi, 178, March, Belg: 
6. On the Synthesis of Right and Left Tartarie acid. Chen 
eal synthesis has hitherto failed to produce any cases of physical 
isomerism. Indeed, in the case of many bodies having rotator 
pers and thus physically different while chemically identical, it 
as been supposed that the rotatory power came from the living 
organism which originated these tn es, being given by a process 
science could not imitate. JuneriEerscH, however, has succeeded 
in freak by urely s7athetie: methods, tartaric acid having 
oor pow asteur has distinguished ‘four kinds of tartaric 
acid: (1) the "bea or dexbrotartaris 3 cid, hemihedral and rota- 
ihedral, and rotating to th (3) racemic acid, opticall 
ee, and capable of splitting into (1) and (2); and (4) inactive 
tartaric acid, not hemihedral and not rotating, but not capable ot 
splitting up as abov mk gris im transforming the in- 
* Kekulé uses ca to represent 4 Ca. 
eo 
