Which French pharmacist authored a significant book on embalming?

The contribution of the French pharmacist B. Gannal is pivotal in the history of embalming. He authored a major work titled "Hydraulic Embalming," published in 1850, which laid down a systematic method for the embalming process and introduced techniques that are foundational in modern embalming practices. His research and methods have been influential in improving the preservation of human remains, which is an essential aspect of funeral service. The importance of Gannal's work cannot be overstated, as it provided both theoretical and practical guidance that has been vital for practitioners in the field. His efforts helped to elevate embalming from a practice rooted in traditional methods to a more scientific and recognized discipline within funeral services.