OCR Text |
Show A physician in S.ikoi, Massachusetts, Massachu-setts, exhibited before uu audience to whom he wad lecturing on diseases, an instrument for feeling tho pulse by telegraph. He not only showed his heaiers his machine, but he put it to a practical lest. In order to explain the variations of the pulse iu certain diseases, the lecture room, by means of a common wire, was placed in telegraphic tele-graphic communication with the city hospital of Boston, which is distant from Salem fifteen miles. Then, with the apparatus referred to, the pulse j beats of various patienta were received and converted by meaus cf a delicate electrometer into a vibrating ray of magnesium light which was thrown upon tho wall. 1 |