199 
of the Cote d’Or. — J. Soc. Chem. Ind., Lond., 1905, v. 24, p. 289 (from 
J. de Pharm. et de Chim., 1905, v. 21, pp. 177-183). 
Chapman and Holt have succeeded in producing a synthetic for- 
maldehyde from a mixture of carbon monoxide, hydrogen, and 
steam. — J. Soc. Chem. Ind., Lond., 1905, v. 24, p. 792 (from Chem. 
Soc. Trans., 1905, v. 87, pp. 916-921). 
Goldschmidt, Carl, points out that formaldehyde in solution exists 
as a hydrate of methylenglycol. While commercial solutions ordi- 
narily contain from 36 to 40 per cent of formaldehyde, it is possi- 
ble to absorb as much as 50 per cent. — Pharm. Zentralh., 1905, v. 46, 
p. 643. 
Wetterstroem, T., examined 11 samples of solution of formaldehyde 
which ranged from 29 to 37 per cent by weight, 30.8 to 39.8 per cent 
by volume. Three of the samples were below 37 per cent.: — Proc. 
Am. Pharm. Ass., 1905, v. 53, p. 184. 
Smith, Bernard H., discusses the methods used in the analysis of 
formaldehyde, the results that were obtained, and includes a table of 
the percentage strength of commercial formaldehyde samples ob- 
tained in 1905. — Proc. Ass. Off. Agr. Chem., 22 Ann. Conv. (1905), 
1906, pp. 29-31. 
Williams, R. H., presents a comparative study of the several meth- 
ods used for the determination of formaldehyde. He concludes that 
the iodometric estimation is rapid and accurate and preferable for 
dilute solutions. The hydrogen peroxide method is the most satis- 
factory for strong impure solutions, though the time necessary for 
complete oxidation is widely variable, depending on concentration 
and temperature. The potassium cyanide method is recommended 
for dilute, impure solutions. The end point in the Legler method is 
not considered satisfactory. — J. Am. Chem. Soc., v. 27, pp. 596-601. 
Fresenius. and Grunhut discuss the applicability of several widely 
used methods of analysis and present slight modifications for the 
peroxide method and the iodometric method. — Ztschr. f . analyt. , 
Chem., 1905, v. 44, pp. 13-24. 
Haywood and Smith present a study of the hydrogen peroxide 
method for determining formaldehyde. They discuss the methods 
that have been proposed by Blank and Finkbeiner and by Fresenius 
and Grunhut and suggest a modification of the former. — J. Am. 
Chem. Soc., 1905, v. 27, pp. 1183-1188. 
La Wall, Charles H., presents a comparative study of the tests for 
formaldehyde, with results obtained, and expresses himself as being 
unhesitatingly in favor of the phenylhydrazine test, both on account 
of its simplicity and the decided reactions obtained in all of the 
dilutions with which experiments were made. He thinks that the 
delicacy of some of the tests, such as the phenol-sulphuric acid test 
