Robert Hare

Robert Hare. An influential American chemist and inventor of the early 19th century, Hare is best remembered for his groundbreaking work in high-temperature chemistry and his invention of the oxyhydrogen blowpipe. His apparatus revolutionized laboratory techniques by generating extreme heat, enabling the study of refractory materials and the synthesis of new compounds. A long-time professor at the University of Pennsylvania, his contributions spanned experimental chemistry, physics, and medical applications, leaving a significant mark on the scientific landscape of his era.

Early life and education

Born into a prominent family in Philadelphia, Hare was the son of a successful brewer. He displayed an early aptitude for science, conducting experiments in a small laboratory on his family's property. His formal education was interrupted by the demands of the family business, yet he pursued scientific studies independently with great vigor. Hare eventually attended lectures at the University of Pennsylvania, where he came under the influence of notable professors like Benjamin Rush. Despite lacking a conventional degree for many years, his demonstrated genius led to his later recognition and appointment within the academic community of his native city.

Scientific career and contributions

Hare's scientific career was defined by ingenious experimentation and instrument design. In 1801, he was elected to the American Philosophical Society, a testament to his early recognition by the intellectual elite of Philadelphia. He secured an appointment as a professor of chemistry at the University of Pennsylvania in 1818, a position he held for nearly three decades. Beyond his famous blowpipe, Hare invented the galvanic deflagrator, a powerful form of voltaic pile that produced intense electrical sparks. His research interests were broad, encompassing studies on the properties of platinum, the composition of gases, and the application of chemistry to geology. He frequently published his findings in the Journal of the Franklin Institute and engaged in scientific discourse with contemporaries across the Atlantic Ocean.

Development of the oxyhydrogen blowpipe

Hare's most celebrated invention, the oxyhydrogen blowpipe, was unveiled in 1801. The device combined streams of hydrogen and oxygen, which, when ignited, produced a flame of unprecedented temperature—exceeding 2,000°C. This tool allowed chemists to fuse materials like platinum, iron oxide, and alumina that were previously considered infusible. The invention had immediate and profound implications, enabling the study of metallurgy and the preparation of calcium oxide and other alkaline earth metals in their pure forms. Hare's apparatus was rapidly adopted in laboratories worldwide, including those in Europe, and paved the way for later advancements in analytical chemistry and the development of limelight for theatrical illumination.

Later life and legacy

In his later years, Hare's interests expanded into controversial areas, including spiritualism, about which he wrote several books. He retired from his professorship at the University of Pennsylvania in 1847. Despite these diversions, his scientific legacy remained secure; he received honorary degrees from Harvard University and was widely respected by institutions like the Franklin Institute. Hare's inventions fundamentally advanced the field of high-temperature chemistry, influencing subsequent generations of scientists and industrial processes. His name is permanently associated with a critical tool that expanded the very limits of chemical experimentation, cementing his place in the history of American science.

Selected works

Hare authored numerous scientific papers and several books throughout his career. Key publications include *"A Brief View of the Policy and Resources of the United States"* (1810) and *"Chemical Apparatus and Manipulations"* (1836), a valuable laboratory manual. His later, more speculative works, such as *"Experimental Investigation of the Spirit Manifestations"* (1855), addressed his forays into spiritualist phenomena. His scientific communications were primarily disseminated through the American Journal of Science and the transactions of the American Philosophical Society, documenting a long and prolific life of inquiry.

Category:American chemists Category:1781 births Category:1858 deaths