Christie, Arthur Carlisle, 1879- · Philadelphia ; London : Lippincott · leaf 22
agnet (Fig. 5). An electro-magnet is a bar of ironmagnetized by an electric current passing through acoil of wire surrounding it (Fig. 6). ELECTRICITY AND MAGNETISM The strength of an electro-magnet is directly pro-portional to the strength of the current passingthrough the wife surrounding it, and…
Radiography, Medical · Diagnosis, Radioscopic · X-rays · Bones · Gastrointestinal system · Radiography · Bone Neoplasms · Gastrointestinal Diseases
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-777-528.webp)
