The Telharmonium's demise came for a number of reasons.

The Telharmonium foreshadowed modern electronic musical equipment in a number of ways.

Just why the telharmonium has not made good its promises of popularity I do not know.

He showed his first telharmonium to Lord Kelvin in 1902.

The telharmonium's signals tended to overwhelm telephone switching systems and cause them to blow out.

However, simple inconvenience hindered the adoption of the Telharmonium, due to its immense size.

Earlier 20th century electronic instruments such as the Telharmonium or the theremin were manually operated.

The Telharmonium was powered by hundreds of multiple-alternator steel rotors and dynamos.

A tonewheel was used in the Telharmonium and in the original Hammond organs.

Examples of electromechanical sound producing devices include the telharmonium, Hammond organ, and the electric guitar.

The electrical signal from the Telharmonium was transmitted over wires; it was heard on the receiving end by means of 'horn' speakers.

He is widely credited with the invention of the first electromechanical musical instrument, which he dubbed the telharmonium.

Thaddeus Cahill, composer, physicist and inventor of the Telharmonium.

Telharmonium tones are "clear and pure" - referring to the electronic sine tones it was capable of producing.

Tonewheels were first developed for and used in the Telharmonium and later in the original Hammond organs.

Cahill had tremendous ambitions for his invention; he wanted telharmonium music to be broadcast into hotels, restaurants, theaters, and even houses via the telephone line.

He went on to produce the Hammond organ, which was based on the principles of the Telharmonium, along with other developments including early reverberation units.

Thaddeus Cahill's Telharmonium (Dynamophone) is one of the earliest, and possibly still the largest, electric instrument.

Like the later Hammond organ, the Telharmonium used tonewheels to generate musical sounds as electrical signals by additive synthesis.

Contemporary newspaper stories described the Telharmonium as "the many mouthed musical giant," and "the Music of A.D. 2000."

The film's main character uses a fictional device called the "Telemelodium" to broadcast his images, which is based on the Telharmonium, an early electronic musical instrument.

The Telharmonium (also known as the Dynamophone) was an early electronic musical instrument, developed by Thaddeus Cahill in 1897.

In 1897 Thaddeus Cahill patented an instrument called the Telharmonium (or Teleharmonium, also known as the Dynamaphone).

An electromechanical instrument called the Telharmonium (sometimes Teleharmonium or Dynamophone) was developed by Thaddeus Cahill in the years 1898-1912.

Reynold Weidenaar: Magic Music from the Telharmonium, The Scarecrow Press Inc.: London (1995).