Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 346
nown, that expands and contracts the same asglass Mitli change in temperature and which, at the same time,vill not be melted by the heat developed in the carbon. Sincetlie l)iilb must remain air-tight, a substance expanding at a differ-ent rate from the glass cannot be used. Several methods of… … Pig. 1 use of tiny bolts when cardboard filaments were used, hut thepasted joint is now ised almost exclusively. Finely powderedcarbon is mixed with some adhesive compound, such as molasses,and this mixture is used as a paste for fastening the carbon to the])latinum. Later, when current is sent…
Architecture · Building · Carpentry
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