Individual letter package from the Science category of Arts in Letters, featuring scientists Michael Faraday and Christian Schonbein . You'll receive a transcription of an actual letter written by Faraday to Schonbein, discussing Faraday's health and Schonbein's work on ozone and antozone, accompanied by biographical and background information and images of their works, mailed to you in a letter envelope. This letter package was previously sent to subscribers and will not be sent out again. Letters ordered by Wednesday at midnight CST will be sent out Saturday, with our regular weekly mailing.