, April 17, 1&, and 19, 1878, and the Washington Star or contraction of the substance iinder test is indicated on and Union newspapers published then gave a description of tors of changes of temperature, must now be consigned to the scale of the gal vanometer. the instrument. Copies of these papers… … E, the carbon button, F, is placed. Upon the outer face of palming off on them adulterated goods," as to the natural it is compressed in the slightest degree, its electrical conduc- the buttMi there is a disk of platinum foil, which is in elec- advantages of American manufacturers. In like manner…
Iron · Illustrated · Improved · Patents · Scientific American · Patented · Twenty years · Steel rails · American supplement · Bright spot · Wrought iron · Years ago · Cast Iron · Trade catalogs · Sir william
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