548 ESSAYS AND OBSERVATIONS 



■white. I might add, that the dufl o£ 

 the apices is fometimes in fo large grains, 

 as to be vifible to the naked eye, as in 

 fome of the malvaceae ; while no con- 

 duits are difcoverable, by magnifying 

 glalTes, in the ftylus, whofe diameter does 

 not much exceed that of the grains of the 

 dufl, which refembling prickly balls, muft 

 be very unfit to enter a firait pafTage. 

 And, 



3tio, That the volatile fpirit, or va- 

 pour of the dufl, may be conveyed to the 

 feed, in this manner ; it may enter the 

 air veflels of the ftylus, pafs through them 

 into the placenta, thence into the funes 

 umhil'icales, and fo into the ova or feeds, 

 along with the nutritive juices. But I 

 cannot omit a remarkable pafTage in this 

 difcourfe, as it anfwers an afTertion of Mr 

 GeofFroy, and on other accounts ; which 

 take in the tranflator*s words. " Tubae 

 " igitur hae, quas Fallopianis comparo, 

 " quod ad ova deferant, non exigua ipfa 

 " ilia pulveris foecundi grana, quae api- 

 *' ces fuper illas ejaculantur, aut in ipfa- 

 *' rumexcutiuntinfundibulum, utfedlatur 



" Leeuwcn- 



