In the early 1900s, electricity was not just lighting homes — doctors were using it to treat disease. High-frequency electric currents became one of the most promoted medical technologies of the era, and physicians genuinely believed these currents could heal the human body. Dr. Samuel Howard Monell was one of the field’s loudest champions. His 1910 book, High Frequency Electric Currents in Medicine and Dentistry, laid out the full scope of this practice in careful detail.
The core idea was straightforward: apply a high-voltage, low-amperage current to the body, and it would stimulate natural healing. Practitioners believed this electricity improved blood circulation, boosted metabolism, and killed germs on the skin. The machines that generated these currents used Oudin coils or Tesla coils and were housed in polished wooden cabinets filled with dials, switches, and wires.
The current reached the patient through glass electrodes — hollow vacuum tubes with metal bases. When switched on, the low-pressure gas inside glowed violet or orange. Touching the tip to a patient’s skin delivered a mild, buzzing charge. The glowing tubes made the treatments look almost otherworldly, which helped sell the idea that something powerful was happening.
The list of conditions these currents claimed to treat was remarkably long. For skin problems, physicians passed the electrodes over affected areas to treat acne, eczema, warts, and lesions. The same technique was said to stimulate hair growth on the scalp.
Beyond skin care, doctors applied electricity to deeper parts of the body to address rheumatism, lumbago, and nervous disorders. Insomnia, abnormal blood pressure, depression, and hysteria were all on the treatment list. For hysteria in women, a specialized massaging electrode was used to induce what physicians of the time called a hysterical paroxysm — a practice documented in Monell’s book without hesitation.
Dentistry adopted these techniques just as eagerly. Fine, pointed electrodes were pressed directly against the gums to treat pyorrhea, a severe gum disease. The electricity was believed to kill bacteria and encourage gum tissue to heal. Dentists also applied thin wire electrodes to aching teeth to reduce pain and sterilize inflamed pulp.
These dental treatments were marketed as a modern, scientific alternative to pulling teeth or invasive surgery. The promise of pain relief through electricity — delivered by a glowing glass tube — made the treatments seem both cutting-edge and safe.
Monell’s book includes detailed visual documentation of these procedures. Patients sit calmly in chairs while physicians and dentists press glowing electrodes against their faces, gums, scalps, and bodies. The scenes look strange today, but at the time they represented the frontier of medical science.
