ed together until sion by burning into a hydraulic lime, may be made to furnish Patented through the Scientific American Patent Agency, they form a creamy paste, after which the paste is mixed Sept. 24, 1872. Further information may be obtained by ad- agood cement by simply allowing a smali… … claimed, efficient fire escape. Figs. 1 and 2 represent the The superior adhesion of selenitic mortar to smooth sur hook by which the ladder used is attached to the building. faces was marked]y shown in experiments made in compari This device is the subject of a separate patent and may be son with…
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![An illustration from Machinæ coelestis pars prior[-posterior] (1673)](https://img.insideoutlibrary.com/img/200/ia-Machinacoelesti1Heve-355-0.webp)
