PREFACE 



CALOR ET FRIGUS. 



THE following fragment, which was first printed by 

 Stephens from a MS. in Bacon's own hand, then be- 

 longing to the Earl of Oxford, and now in the British 

 Museum (Harl. 6855.), is here reprinted from the orig- 

 inal. By the general title Sequela Cartarum, and the 

 heading l Sectio ordinis, &c., it appears to have been 

 ied for the commencement of a methodical en- 

 quiry ; but it breaks off at so early a stage that no new 

 light can be gathered from it ; and the plan upon which 

 Bacon at this time proposed to proceed in these investi- 

 gations he afterwards materially altered. For the final 

 shape which his speculations concerning Heat and Cold 

 took, see the second book of the Novum Organum. 



J. S. 



1 This heading is carefully and fairly written out in Bacon's Roman 

 hand at the top of every page ; not in a single line, as it is here printed 

 but thus: 



Calor et Frigtis 



i<> ordinis 

 Carta Suggestionis. 



