556 NOVUM OROANUM. [BOOK IL 



piece of lighted paper in it, by which the water is drawn up, and 

 of those cups which, when heated, draw up the flesh. For they 

 think that in each experiment the rarefied air escapes, and that 

 its quantity is therefore diminished, by which means the water 

 or flesh rises by the motion of connection. This is, however, 

 most incorrect. For the air is not diminished in quantity, but 

 contracted in dimensions/ nor does this motion of the rising of 

 the water begin till the flame is extinguished, or the air cooled, 

 so that physicians place cold sponges, moistened with water, on 

 the cups, in order to increase their attraction. There is, there 

 fore, no reason why men should fear much from the ready escape 

 of air : for although it be true that the most solid bodies have 

 their pores, yet neither air, nor spirit, readily suffers itself to be 

 rarefied to such an extreme degree; just as water will not 

 escape by a small chink. 



2. With regard to the second of the seven above-mentioned 

 methods, we must especially observe, that compression and 

 similar violence have a most powerful effect either in producing 

 locomotion, and other motions of the same nature, as may be 

 observed in engines and projectiles, or in destroying the organic 

 body, and those qualities, which consist entirely in motion (for all 

 life, and every description of flame and ignition are destroyed 

 by compression, which also injures and deranges every machine) ; 

 or in destroying those qualities which consist in position and a 

 coarse difference of parts, as in colours ; for the colour of a 

 flower when whole, differs from that it presents when bruised, 

 and the same may be observed of whole and powdered amber ; 

 or in tastes, for the taste of a pear before it is ripe, and of the 

 same pear when bruised and softened, is different, since it 

 becomes perceptibly more sweet. But such violence is of little 

 avail in the more noble transformations and changes of homo 

 geneous bodies, for they do not, by such means, acquire any 

 constantly and permanently new state, but one that is transitory, 

 and always struggling to return to its former habit and freedom. 

 It would not, however, be useless to make some more diligent 

 experiments with regard to this ; whether, for instance, the 

 condensation of a perfectly homogeneous body (such as air, 

 water, oil, and the like) or their rarefaction, wnen effected by 

 violence, can become permanent, fixed, and, as it were, so 

 changed, as to become a nature. This might at first be tried by 

 simple perseverance, and then by means of helps and harmonies. 

 It might readily have been attempted (if we had but thought of 



7 Part of the air is expanded and escapes, and part is consumed by 

 the flame. When condensed, therefore, by the cold application, it can- 

 not offer sufficient resistance to the external atmosphere to prevent the 

 liquid or flesh from being foro*J into the 



