of edges. The back band is passed through the slot in the separately fromthe maps, but are made of suitable form sulphur or other vulcanizing agents. To obtain the improv- plate, as shown in Fig. 1. Itis apparent that any down- and size to fit into holes or cavities in the faces of the maps, ward… … a map and its appropriate blocks. Part No. 1 of the first At the lower edge of the buckle frame is a downward ex- series consists of map No. 1 tension, on the face of which is formed a hook, G, whose tween the temperatures of 100° and 212° Fabrenheit or and ninety-seven blocks, each block relating…
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![An illustration from S.P. Avery, engraver on wood : [scrapbook of samples of his work]](https://img.insideoutlibrary.com/img/200/met-p16028coll4_15500-52-1.webp)
