174 PREFACE TO THE SCALA INTELLECTUS 



stauratio Magna must close. Of the fourth part not 

 even any fragment has come down to us, unless the 

 Inquisitio legitima de Mbtu, sive Filum LabyrintM, be 

 taken for one. But though this was undoubtedly in 

 tended to be &quot; verae et legitimae de rebus inquisitionis 

 exemplar&quot; and such it was the business of the fourth 

 part to exhibit, I rather think that it was designed 

 originally for the second part (as the example in which 

 the new method was to be set forth), and that the 

 Inquisitio de Formd Calidi was substituted for it. I 

 have preferred therefore to place it among the works 

 abandoned or superseded. 



With regard to the fifth part however, I am not so 

 confident that Mr. Ellis is right in refusing a place in 

 it to the De Fluxu et Refluxu, the Thema CceK, the 

 De Principiis atque Originibus, and the Cogitationes de 

 Naturd Rerum ; all which he classes as &quot; occasional 

 writings, not belonging to the circuit of the Instaura- 

 tio&quot; It is true that they were written long before the 

 publication of the Nbvum Organum, and that they do 

 not come within the circuit of Bacon s work on the 

 Interpretation of Nature as originally projected. That 

 work (to judge by the title, which has fortunately been 

 preserved) was to be distributed into three books, the 

 first to prepare the mind, the second to explain the 

 method, the third to exhibit the results of the method 

 applied. It must therefore have been designed to cov 

 er the ground occupied by the second and sixth parts 

 of the Instauratio, and perhaps also that occupied by 

 the third and fourth ; but could not have been meant 

 to contain anything answering to the first and fifth. 

 My own impression however is, that one of Bacon s 

 objects in enlarging the design was to make a place 



