She he invented the photographic print and the negative washing machine.He invented the photographic print and the negative wash machine!
india
alex oulton
Henry fox talbot
around 100 BC to late 50 BC
to separate the negative numbers and the positive numbers on a number line
The negative effect was that they did not hire workers to do the job so a hand full of people did not have a job after the reaper was invented.
Benjamin Franklin is credited with proposing the concept of positive and negative charges in the 18th century while conducting experiments with electricity.
He is an American electrical engineer and he invented the negative feedback amplifier in 1927.
It is not completely clear. Other signs were used for the negative sign, such as the letter m for minus. In fact, in 1484 Chuquet used the m for minus. I will provide a great link with lots more info on the history of negative numbers.
The paper negative process was attributed to William Henry Fox Talbot in 1839. Talbot developed this method as an early form of photography using paper coated with silver iodide to produce negative images.
Assuming you mean the first to be made permanent, that would be Joseph Nicéphore Niépce, circa 1826.