Observations on the Jesuit's bark, or cinchona
                                Date
                            
                            
                                28 November 1687
                            
                            
                        
                            
                            
                            
                                Creator
                            
                            
                                Unknown, Artist
                            
                            
                        
                            
                            
                            
                                Object type
                            
                            
                            
                        
                            
                            
                            
                                Archive reference number
                            
                            
                            
                        
                            
                            
                            
                                Manuscript page number
                            
                            
                                p11
                            
                            
                        
                            
                            
                            
                                Material
                            
                            
                            
                        
                            
                            
                            
                                Dimensions
                            
                            
                                height (page): 195mm
width (page): 155mm
                            
                        
                            
                            
                            width (page): 155mm
                                Subject
                            
                            
                            
                        
                            
                            
                            
                                Content object
                            
                            
                            
                        
                            
                            
                            
                                Description
                            
                            
                                Five figures in a letter from Antoni van Leeuwenhoek to the Royal Society. The original drawings are lost. 
Fig. 1: a piece of cinchona bark drawn through the microscope
Fig. 2: the same piece of bark as it appears to the naked eye
Fig. 3: a single such particle
Fig. 4: a few such particles together
Fig. 5: a small piece of cinchona bark cut crosswise.
                            
                            
                        
                            
                            
                            Fig. 1: a piece of cinchona bark drawn through the microscope
Fig. 2: the same piece of bark as it appears to the naked eye
Fig. 3: a single such particle
Fig. 4: a few such particles together
Fig. 5: a small piece of cinchona bark cut crosswise.
                                Object history
                            
                            
                                At the meeting of the Royal Society on 1 December 1687, ‘A letter  of Mr. Leewenhoeck, containing his microscopical observations on cochineal and the Jesuit’s bark, or chinachina, was produced, and ordered to be translated’ (Birch 4:556).
Printed images taken from a published version of the letter (the same plate is in the Dutch and Latin versions):
Antoni van Leeuwenhoek, Vervolg der Brieven, geschreven aan de Wytvermaarde Koninglijke Societeit tot Londen (Leiden: C. Boutesteijn, 1687), pp. 141-55.
Antoni van Leeuwenhoek, Continuatio Epistolarum (Leiden: Boutesteyn, 1689), pp. 113-24.
                            
                        
                            
                            
                            Printed images taken from a published version of the letter (the same plate is in the Dutch and Latin versions):
Antoni van Leeuwenhoek, Vervolg der Brieven, geschreven aan de Wytvermaarde Koninglijke Societeit tot Londen (Leiden: C. Boutesteijn, 1687), pp. 141-55.
Antoni van Leeuwenhoek, Continuatio Epistolarum (Leiden: Boutesteyn, 1689), pp. 113-24.
                                Related fellows
                            
                            
                                Antoni van Leeuwenhoek (1632 - 1723, Dutch) , Naturalist
                            
                            
                        
                            
                            
                            
                                Associated place