Relates to the preparation of medicines, with a few descriptions of the apparatus employed, and the modes of adjusting and using such apparatus. In the handwriting of Theodore Turquet de Mayerne. On the 105th leaf there is 'Censura Trogniana in aliquot operationes hoc libro contentas', and on the 109th, 'Cathartica quædam mineralia'. Many of the formulae, apparently original, have de Mayerne's monogram; others are taken from Paracelsus, with observations of the compiler, and the doses to be administered. There is an index at the end.