Joseph Henry's Record of Experiments, Book 2

Henry's personal record of his own scientific experiments began in the mid 1830's with Book 1 and continues with Book 2. This second volume documents experiments from 1839 to 1842, after he has completed a tour of European science centers where he extended his network of fellow scientists. Beginning with variations on an experiment in electromagnetism, this record reveals Henry's keen interest in a variety of scientific topics and their application. Please help us transcribe these notes from an inventor and scientist who did much to raise the profile of science in America.