LIB. II. 41,42. 271 



fiant ex vitello, quid ex albumine ovi, et alia. Similis 

 est ratio circa animalia ex putrefactione. Nam circa 

 animalia perfecta et terrestria, per exsectiones foetuum 

 ex utero, minus humanum esset ista inquirere 47 ; nisi 

 forte per occasiones abortuum, et venationum, et simi- 

 lium. Omnino igitur vigilia quacdam servanda est 

 circa naturam, ut quae melius se conspiciendam prae- 

 beat noctu, quam interdiu. Istae enim contemplationes 

 tanquam nocturnae censeri possint, ob lucernae parvi- 

 tatem et perpetuationem. 



Quin et in inanimatis idem tentandum est : id quod 

 nos fecimus in inquirendis aperturis liquorum per 

 ignem. Alius enim est modus aperturae in aqua, alius 

 in vino, alius in aceto, alius in omphacio ; longe alius 

 in lacte, et oleo, et caeteris. Id quod facile cernere 

 erat per ebullitionem super ignem lenem, et in vase 

 vitreo, ubi omnia cerni perspicue possint. Verum haec 

 brevius perstringimus ; fusius et exactius de iis sermo- 

 nes habituri, cum ad inventionem latentis rerum pro- 

 cessus ventum erit. Semper enim memoria tenendum 

 est, nos hoc loco non res ipsas tractare, sed exempla 

 tantum adducere. 



XLII. 



Inter prcerogativas instantiarum, ponemus loco de- 

 cimo nono instantias supplement, sive substitutionis ; 

 quas etiam instantias perfugii appellare consuevimus 48 . 



47 Bacon s humanity is here con- brought about by the Tabula- gra- 



spicuous by the side of some of the duum without this ; and (2) per 



modern Physical discoverers ; whose analoga. Such would be Bp. But- 



experiments on Instinct on the ler s substitution of the laws of 



sensitive and other nerves have Physics in the investigation of the 



been marked by a disregard of ani- Moral and Religious Laws of God. 



mal suffering. In all subjects false Analogies ap- 



8 This substitution is to be two- parent and not real parallels have 



fold (i) per graduationem which, been a continual source of error: 



one would have thought, might be and nothing is so alluring or dan- 



