VITREOUS ENAMELING 9 



ing of enameled articles. German Patent 251,059, Sept. 5, 1911. C. A., 



7, 235. 

 Eyer, Ph. How much of the heat applied to enamel firing and melting ovens 



is useful? Glashutte, 41, 931-2; C. A., 6, 415. 

 Franchet, L. Preparation of Grecian black enamel with natural ferroso 



ferric oxide. Compt. rend., 152, 1097-1100 (1911); /. Soc. Chem. Ind., 



30, 622. 

 Green enamels for galvanized iron. Glashutte, 41, 604-6, 649-51 (1911) ; 



C.A., 5, 3503. 

 Grunwald, J. The chemical technology of enamel raw material. Glashutte, 



40, 41, 42. In 42 installments. See under Books, also. 

 Grunwald, J. The use of zirconia in the enameled iron industry. Sprechsaal, 



44, 72-3 (1911); C. A., 5, 2163; /. Soc. Chem. Ind., 30, 210. 



Doubt is expressed as regards the efficiency of zirconium oxide as an 



opacifier. 

 Havas, B. The function of the ground enamel. Sprechsaal, 44, 72-3 (1911); 



C.A., 5,2163. 

 Landau et Cie, and Rosenzweig, C. White enamels. English Patent 10,418, 



Apr. 29, 1911. French Patent 429,665, May 12, 1911. C. A., 6, 2986; 



/. Soc. Chem. Ind., 30, 1213; La Ceramique, 14, 204. A part of the silicate 



of either the natural or artificial silicate of zirconium is removed by warm- 

 ing with alkali carbonate or hydroxide, which product is very suitable for 



rendering enamels opaque. 

 Landau, Kreidl, Heller and Co. White enamels. German Patent 283,504. 



June 23, 1911. C. A., 9, 2579. Addition to German Patent 274,860. 

 Landau, Kreidl, Heller and Co. White enamel with metal hydroxides as 



clouding agents. German Patent 289,102. Oct. 3, 1911. 

 Landrum, R. D. Resistance of sheet enamels to solution by acetic acids of 



various strengths. Trans. Amer. Ceram. Soc., 13, 494-501 (1911); 



C. A., 5, 3886; /. Soc. Chem. Ind., 30, 1386. 

 Mayer, M., and Havas, B. The coefficient of expansion of enamels and their 



chemical composition. Sprechsaal, 44, 188-91, 207-10, 220-2 (1911); 



C. A., 5, 2163; /. Soc. Chem. Ind., 30, 543. 

 Mayer, M., and Havas, B. Reactions during the fusion of iron enamels 



(containing fluorine). Sprechsaal, 44, 6-8 (1911); C. A., 5, 2163; /. 



Soc. Chem. Ind., 30, 930. 

 Meyer, A. Enameling or glazing plates of iron, steel, etc. German Patent 



266,161, July 9, 1911. C. A., 8, 809. 

 Meyer, A. Enameled or glazed plates of iron or steel. German Patent 



272,355, July 9, 1911. C. A., 8, 2612. 

 Minneman, Johannes. An investigation on art enameling on metals. Trans. 



Amer. Ceram. Soc., 13, 514-30 (1911); C. A., 5, 3890; /. Soc. Chem. Ind., 



30, 1386. 

 Olsberger and Altenbekener Eisenhiittenwerke C. Kropff . Enameled cooking 



utensils. German Patent 244,389, Mar. 2, 1911. C. A., 6, 2304. 



