Journal of the American Ceramic Society

Geister, Carl H.

doi: 10.1111/j.1151-2916.1926.tb17140.xpmid: N/A

ABSTRACT The findings of a practical investigation of flooring materials are summarized. The endurance and sanitary properties of the materials were determined by use of the abrasion, absorption, indentation, chemical, stain, and age tests. The methods used are described.

Heindl, R. A.

doi: 10.1111/j.1151-2916.1926.tb17141.xpmid: N/A

ABSTRACT This paper is the first progress report of a comprehensive study of sagger clays. It includes the results of a preliminary study of clays representative of those used in sagger making throughout the United States. Chemical analyses, and a summary of physical tests, petrographic examinations, and the effect of repeated burns in pottery kilns are given. As a result of this work the clays have been classified into five groups characterized by properties in the fired state. The paper also contains an outline of a proposed intensive and fundamental study of a limited number of clays typical of each group.

Norton, F. H.

doi: 10.1111/j.1151-2916.1926.tb17142.xpmid: N/A

ABSTRACT The design of arches is considered from the view point of minimizing the static and temperature stresses. The catenary shape of arch is most satisfactory, as it allows the use of a high arch with good stability. Some actual designs are worked out to illustrate the method of calculating a catenary arch.

Fisk, H. G.

doi: 10.1111/j.1151-2916.1926.tb17143.xpmid: N/A

ABSTRACT A gas‐fired test furnace of quite general application is described.

Jackson, Frederick G.

doi: 10.1111/j.1151-2916.1926.tb17144.xpmid: N/A

ABSTRACT Two clays rich in scum‐forming bases are studied. One is practically free from sulphur, the other heavily charged with it. Draw trials of these clays are taken from laboratory and commercial kilns at suitable temperature intervals. Commercial firings typify minimum, average and extreme sulphur exposure in coal‐fired kilns. Laboratory firings are in imitation of them. The draw trials are analyzed for water‐soluble sulphates and bases and the percentages of the appropriate sulphates are presented in the form of tables. Comparisons of results show that the temperature attained has much more influence on the amount of sulphates formed in the ware than concentration, or time of sulphur exposure. Calculations show that even under the most favorable firing conditions, with 0.5% sulphur coal on a 64‐hour schedule of firing, twelve times as much sulphur is available as is actually absorbed. Even under the most severe conditions the concentration of sulphur gases from the coal in the kiln gases is so small, (1%), and the maximum evolution of sulphur gases from the ware is such a small fraction (2.6%) of the volume of kiln gases, that the effect of the former in retarding the formation of the latter according to the Law of Mass Action, must be unnoticeable. It is, therefore, futile to try to avoid sulphate formation with coal as a fuel by seeking a coal low in sulphur. The method of study used is recommended for intensive investigation of firing conditions with the object of attaining maximum economies.

doi: 10.1111/j.1151-2916.1926.tb17145.xpmid: N/A

Curtis, Edmund deF.

doi: 10.1111/j.1151-2916.1926.tb17146.xpmid: N/A

Cook, M. Elizabeth

doi: 10.1111/j.1151-2916.1926.tb17147.xpmid: N/A