Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 99
ill reach themortar of the wall on which the coping stone is laid. If the joint bemade open, to avoid this, the head of the water will enable it to sur-mount the slope B. If the joint be closed by mortar, the alternateexpansion and contraction of the stones will work the mortar loose,and form… … ZZJZ FRANKLIN INSTITUTE. 31onthIy Conversation Meeting. The third conversation meeting of the Institute, for the season,was held at (heir Hall, Nov. 27th, 1834. Mr. Thomas Ellicott, of Philadelphia, explained a weighing ma- American Patents for July, with Remarks. 93 cliine, and, by reference to a…
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