Callus of hand and feet
                                Date
                            
                            
                                7 July 1722
                            
                            
                        
                            
                            
                            
                                Object type
                            
                            
                            
                        
                            
                            
                            
                                Archive reference number
                            
                            
                            
                        
                            
                            
                            
                                Manuscript page number
                            
                            
                                p273
                            
                            
                        
                            
                            
                            
                                Material
                            
                            
                            
                        
                            
                            
                            
                                Dimensions
                            
                            
                                height (page): 320mm
width (page): 200mm
                            
                        
                            
                            
                            width (page): 200mm
                                Subject
                            
                            
                            
                        
                            
                            
                            
                                Description
                            
                            
                                Three drawings in a letter from Antoni van Leeuwenhoek to the Royal Society.
Fig. 6: a small bit of callus.
Fig. 7: the layers of callus, showing the growth day by day (observed with a microscope).
Fig. 8: an even thinner bit of skin.
Antoni van Leeuwenhoek had the images drawn for him. The drawings were printed in Philosophical Transactions of the Royal Society, vol. 32, no. 373 (1723).
The printed images can be found, now with the original letter, at EL/L4/81/008a.
                            
                            
                        
                            
                            
                            Fig. 6: a small bit of callus.
Fig. 7: the layers of callus, showing the growth day by day (observed with a microscope).
Fig. 8: an even thinner bit of skin.
Antoni van Leeuwenhoek had the images drawn for him. The drawings were printed in Philosophical Transactions of the Royal Society, vol. 32, no. 373 (1723).
The printed images can be found, now with the original letter, at EL/L4/81/008a.
                                Object history
                            
                            
                                Figures printed as A. Leeuwenhoek, 'Observations upon the callus of the hands and feet', Phil. Trans. vol. 32, no. 373 (1723), pp. 156-61.
                            
                            
                        
                            
                            
                            
                                Related fellows
                            
                            
                                Antoni van Leeuwenhoek (1632 - 1723, Dutch) , Naturalist
                            
                            
                        
                            
                            
                            
                                Associated place