Leeuwenhoek, Antonii van
Opera Omnia seu Arcana Naturae
apud Joh: Arnold: Langerak, 1722
After developing his method for creating powerful lenses and applying them to a thorough study of the microscopic world, van Leeuwenhoek was introduced via correspondence to the Royal Society of London and soon began to send copies of his recorded microscopic observations. In 1673 his earliest observations of bee mouthparts and stings were published by the Royal Society. Despite this initial success, the Royal Society questioned van Leeuwenhoek's credibility when he sent the Royal Society a copy of his first observations of microscopic single-celled organisms. Previously, the existence of single-celled organisms were entirely unknown and initially were met with scepticism. Eventually, in the face of Van Leeuwenhoek's insistence, the Royal Society sent an team of respected observers to confirm van Leeuwenhoek's observations.
Van Leeuwenhoek's vindication resulted in his appointment as a Fellow of the Royal Society in that year. After his appointment to the Society, he wrote approximately 560 letters to the Society and other scientific institutions over a period of 50 years, detailing the subjects he had investigated.