332 SOIENCE. 
Several interesting transformations were also 
studied. 
On the Absorption of Oxygen by Tetrabromfur- 
furan: By H. A. Torrey. Although a-di- 
bromfurfuran is readily oxidized by exposure 
to the air, tetrabromfurfuran, which likewise 
contains two bromine atoms in the @-position, 
undergoes no change under like conditions. 
Exposure to direct sunlight, however, produces 
a change which the author has shown to be due 
to oxidation. The product formed was shown 
to be dibrommaley! bromide and the conditions 
most favorable for the action were studied. 
On Halogen Addition-Products of the Anilides: 
By H. L. WHEELER, B. BARNES and J. H. 
Pratt. The authors have continued their 
work on the perhalides and compared them, as 
regards their crystallographic form, with the 
alkali perhalides. They found, however, that 
the perhalides of the anilides were not analo- 
gous in crystal form, and other facts also showed 
that the compounds from which the perhalides 
were prepared were not, as was supposed, sub- 
stituted ammonium compounds. All these are 
derived from two molecules of an anilide with 
one of a halogen acid. Several structural for- 
mulas are suggested as theoretically possible ; 
but they consider the evidence to favor the di- 
ammonium structure of which the following is 
an example: 
HY. /C0CH: 
H bee 
Ci. /COCH, 
Be NC 
A number of perhalides were prepared and 
their properties studied, ‘both from a chemical — 
and physical standpoint. 
On the Permeation of Hot Platinum by Gases: 
By Wyatt W. RANDALL. After giving a his- 
torical résumé of the work that has a bearing 
on this point the author gives the results ob- 
served in the preparation of pure hydrogen. 
The form of apparatus used, in which every 
possible precaution was taken to insure the 
purity of the hydrogen before it came in con- 
tact with the hot platinum, is given in detail. 
In these experiments the passage of the hydro- 
gen was very slow as compared with the results 
obtained by Graham. Under the same condi- 
[N. S. Vou. VI. No. 139. 
tions oxygen and nitrogen do not permeate the 
tube, and experiments made with marsh gas, 
which has a density only half that of oxygen, 
have so far given negative results. The hydro- 
gen was examined spectroscopically, as this 
method was the most delicate for detecting the 
presence of other gases. The photographs all 
showed the so-called ‘compound’ spectrum. 
Whether this is evidence of some contamination 
can not yet be decided, as the evidence is not 
sufficient to settle this point. 
On Some Malonic Acid Derivatives: By R. 8. 
Curtiss. When ethylchlormalonate is treated 
with cold alcoholic ammonia a compound is 
formed in which the chlorine atom remains 
intact; whereas if the action is carried on in a 
sealed tube at 140° the chlorine atom is dis- 
placed. On treating ethylbrommalonate with 
aniline, a weaker base than ammonia, he ob- 
tained, as he expected, a compound in which the 
bromine was substituted, without affecting the 
carbethoxyl group. By treating ethylanilido- 
malonate with mercuric oxide he obtained ethyl- 
dianilidomalonate and also studied the action 
of sodium ethylate on ethyldibrommalonate. 
The Action of Nitric Acid on Triphenylmethane : 
By E. 8. Smire. In attempting to prepare 
trinitrotriphenylmethane by the action of fum- 
ing nitric acid on triphenylmethane the author 
obtained in one case a compound which was 
shown to be triphenylearbinol. This substance 
is usually made by the use of chromic acid as 
the oxidizing agent, but in the case mentioned 
the nitric acid acted in a similar manner. 
Reviews of the following recent publications 
are also contained in this number of the Jour- 
nal: Das Studium der technischen Chemie an 
den Universitaten und technischen Hochschulen 
Deutschlands und das Chemiker-Examen, F. 
Fischer; Water and Public Health, J. H. 
Fuertes ; Frihling und Schulz’s Anleitung zur 
Untersuchung der fiir die Zucker-Industrie in 
Betrachtkommenden Rohmaterialien, Producte, 
Nebenproducte und Hiilfssubstanzen, R. Frih- 
ling ; Tabellarische Uebersicht der Pyrazolderi- 
vate, G. Cohn; The Chlorination Process, H. 
B. Wilson ; Tabellen fiir Gasanalysen, gasvolu- 
metrische Analysen, Stickstoffbestimmungen, 
etc., G. Lunge. 
J. ELLIOTT GILPIN. 
