. Transactions. J^CfTttJ • Car^oTK. Fig. 3. Fig. 4. l8- Ai I / ^4- i Sfr TTTn _i. /f«aJ lyea/fTjrrtlMbJer^ufncJtedi-noidrtm* J^t>Mwt~^au ty#A ? Fig. percent- Ca/^o^ Fig. 6. previous to testing. In the case of certain of the harder specimens, itwas necessary to soften the ends so that a thread could be cut on was accompUshed, without affecting the reduced section of the J. H. NEAD 223 specimens, by partially immersing them in water and playing a flame onthe end to be softened.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries