Early Life, Family and Training

Robert Cornelius was born in Philadelphia, PA, on March 1, 1809. He grew up in a household shaped by the industrious spirit of his father, Christian Cornelius, who had emigrated from Amsterdam in 1783. His mother, Sarah Cornelius, née Soder, helped raise him in a city that was becoming a center for both science and trade. As a youth, Robert attended private school, where he began to develop a particular interest in the complexities of chemistry.

By 1831, Robert had entered the family business, working alongside his father. The family business was involved in the manufacturing of lamps and chandeliers, a trade that required precision and a deep understanding of metals. Through this work, Robert Cornelius developed a specialized skill set in silver plating and metal polishing. These technical abilities would later prove essential when he transitioned into the experimental world of early photography.

Pioneering Work in Philadelphia

In the bustling streets of Philadelphia, Robert Cornelius found his way into the early days of photography. He was a man of many trades, working with metals and chemicals, but his interest in the new medium of the daguerreotype soon took center stage. Between 1839 and 1843, he operated two photographic studios, establishing himself as a pioneer in the history of photography. His work helped define the early landscape of the medium in the United States.

His business presence was felt in several key locations throughout the city. He operated a studio at Eighth and Market Streets, and another in Lodge Alley, which is known today as Ranstead Street. In May 1840, he opened the first photographic studio in Philadelphia, making him a central figure in the city's growing photographic community. These spaces were more than just shops; they were the sites where the technical possibilities of light and chemistry were being tested daily.

During the period between 1840 and 1842, Cornelius was active in managing these early studios. His presence in Philadelphia helped usher in the daguerreotype era, providing a space where the local population could have their likenesses captured. He was part of a small, experimental group of people trying to understand how to make a permanent image of the world around them.

Innovative Techniques and Inventions

Cornelius was a man of practical experimentation, always looking for ways to make the difficult process of early photography more manageable. He understood that the long, grueling exposure times required for a portrait were a challenge for both the photographer and the subject. To solve this, he collaborated with the chemist Paul Beck Goddard. Together, they utilized bromine as a sensitizer on the silver plates. This chemical adjustment was a significant step forward, as it helped to significantly reduce the exposure time needed to capture a clear image.

His technical curiosity extended beyond the chemistry of the plates to the very way light entered the camera. He experimented with reflectors and blue glass filters to better control and enhance the lighting during a session. This careful manipulation of light allowed for much more reliable results in his Philadelphia studios. He was not merely a practitioner of the daguerreotype but an inventor who sought to master the elements of light and chemistry to serve his craft.

His inventive spirit also led him into the realm of illumination. In 1843, he patented the solar lamp, a device designed to burn more brightly and efficiently by using lard as a fuel source instead of the more expensive whale oil. His interest in light and energy was further demonstrated by his work with gaslights, which he found ways to light using electric sparks. These practical contributions showed a mind that was constantly seeking to improve the tools of his trade through scientific application.

Key Works and Photographic Achievements

In 1839, Cornelius captured a moment that would change the course of visual history. By using a makeshift camera obscura, he produced a daguerreotype self-portrait that is widely recognized as the first intentional photographic portrait of a person in the United States. This image, which he inscribed with the words "The first light picture ever taken. 1839," required him to remain perfectly still for a significant amount of time to allow the light to settle upon the plate. It remains a vital piece of early photography, preserved today in the Library of Congress.

His work extended beyond his own likeness to the people of Philadelphia. He documented various individuals, including a portrait of Martin Hans Boye in December 1843 and a 1847 portrait of Captain Charles John Biddle in his Mexican War uniform. These images were part of a larger body of work produced during his time operating studios on Eighth and Market Streets. While many early photographic efforts were lost to time, approximately 54 of his photographic portraits have survived to the present day.

• Self-portrait (1839)
• Portrait of Martin Hans Boye (December 1843)
• Portrait of Captain Charles John Biddle (1847)