260 NOVUM ORGANUM. 



sensus per corpora media ; vel (3) quia objectum non 

 cst habile ad impressionem in sensu faciendam ; vel 

 (4) quia deficit quantum in objecto pro feriendo sensu ; 

 vel (5) quia tempus non est proportionatum ad actu- 

 andum sensum ; vel (6) quia object! percussio non to- 

 leratur a sensu; vel (7) quia objectmn ante implevit et 

 possedit sensum, ut novo motui non sit locus. Atque 

 Iwc pnvcipue ad visum pertinent, et deinde ad tactum. 

 Nam hi duo sensus sunt inf ormativi ad largum, atque 

 de com muni bus objectis; ubi reliqui tres non informent 

 fere, nisi immediate, et de propriis objectis. 



(1) In primo genere non fit deductio ad sensibile, 

 nisi rei, qua* cerni non possit propter distantiam, adji- 

 ciatur aut substituatur alia res, qua; sensum magis e 

 longinquo provocare et ferire possit : veluti in signifi- 

 catione rerum per ignes, campanas, et similia. 



(2) In secundo genere fit deductio, cum ea, qua- 

 interius propter interpositionem corporum latent, nee 

 commode aperiri possunt, per ea, qua 1 sunt in super- 

 ficie, aut ab interioribus effluunt, ])erducuntur ad sen- 

 sum : ut status humanorum corj)ortim j)er pulsus, et 

 urinas, et similia. 



(3, 4) At tertii et quarti generis deductiones ad plu- 

 rima spectant, atque undique in rerum inquisitione 

 sunt conquirenda?. JIujus rei exempla sunt. Patet 

 quod aer, et spiritus, et bujusmodi res, qua; sunt toto 

 cor])ore tenues et subtiles, nee cerni nee tangi possint. 



verable with a Telescope, would be fore us by the Microscope. Of the 



apt illustrations of this subdivision, fifth, the measurement of very rapid 



The second division may be well intervals by electric light would be 



illustrated by the Stethescope. The an instance. Of the sixth, coloured 



third by the chemical detection of glasses to shade off the Sun s light. 



Gases, or (e. g.) the discovery of Of the seventh, he adduces strong 



Actinism in rays of the Sun by ex- smells as his example, but thinks 



posure of a plate of silver to them, the class one of no great import- 



The fourth would be brought be- ance. 



