285 
UNGUENTUM KYDRARGYRI NITRATIS. 
Snavely, Clarence O., suggests a modification of the official for- 
mula and process which he believes has the advantage of insuring a 
definite solution of mercuric nitrate, without any mercurous salt, 
and a product having less odor. — Am. J. Pharm., Phila., 1905, 
v. 77, pp. 233-239. 
UNGUENTUM HYDRARGYRI OXIDI FLAVI, 
An abstract discusses the several methods that have been proposed 
for making Pagenstecher’s ointment and suggests that the 2 per 
cent ointment be included in the next Ph. Germ. — Pharm. Ztg., Ber- 
lin, 1905, v. 50, p. 686. 
Stunner, J. W., believes that the presence of water in an oint- 
ment made with freshly precipitated mercuric oxide, is objectionable 
and therefore recommends that the water be washed out with alcohol, 
and the latter with ether. Before the ether has evaporated entirely 
he mixes the mercuric oxide with the desired ointment base to make 
a 50 per cent stock ointment, which he dilutes as needed. — Apothe- 
cary, Boston, 1905, v. 17, p. 951. 
UNGUENTUM HYDRARGYRI OXIDI RUBRI. 
Raubenheimer, Otto, suggests the following formula for the prep- 
aration of a permanent ointment of red mercuric oxide. Red mer- 
curic oxide, 10 gm. ; castor oil, 5 gm. ; petroleum, 85 gm. ; mix. The 
finished ointment he recommends keeping in a jar under about 1 
inch of water. — Am. Druggist, N. Y., 1905, v. 47, p. 200. 
TJNGUENTUM POTASSII IODIDE 
Caldwell, Paul, suggests — 
Substituting potassium carbonate for sodium hyposulphite is not an improve- 
ment. The alkalies tend to liquefy the lard and thus make the ointment 
soft. If hydrous wool fat and white petrolatum were the base, no doubt this 
difficulty would be overcome.— Drug. Circ. & Chern. Gaz., 1905, v. 49, p. 307. 
UNGUENTUM ZINCI OXIDI. 
Magoffin, A. E., suggests the use of enough glycerin, in the formula 
for the ointment of zinc oxide, to make a paste with the zinc oxide 
before adding the petroleum. — Drug. Circ. & Chem. Gaz., 1905, v. 49, 
p. 346. 
Caldwell, Paul, recommends mixing two-thirds of the lard, previ- 
ously melted, with the zinc oxide and running the mixture through 
a number 60 sieve into a suitable dish immersed in ice water. Heat 
the remainder of the lard and pass this through the sieve into the 
