...contrary, it was only visible in a certain position and at a certain angle; and therefore, he thought, could be accounted for upon scientific principles. A little later in the evening, the Hon. Mr. Kelley , of Philadelphia, came in. As he sat down, he took a letter out of his pocket, saying: Mr. President, while on a visit home, a week or two ago, I took up a number of the Anti-Slavery Standard, in wh...