112 THE ORIGIN OF 



]»le arc so frequently tormented with tliem/73) 

 Jn Sweden the third part of the sick poor, who are 

 hadly fed, and who use the waters of the Soetra, 

 arc very ofton attacluMl with verminous diseascs. 



§ LXXII. Faithful to the maxims estahlislied 

 in the beginning of this second Lecture, 73) and 

 remote from all tlie charms of hypothesis, I have 

 only been solicitous to present such observations 

 as relate to the generation of worms in the living 

 liuman body, which, if not entirely satisfactory, 

 when philosophically analysed, throw some light 

 on a subject which has always been the object of 

 t'ne most Assiduous researches of physicians and 



naturalists. (7-1) 



If we unite all that has been hitherto said, it 

 seems that we may with reason establish sixfunda- 

 mejital principles relating to the origin of human 

 worms ; if they should not satisfy naturalists, they 

 at least m'jrit all the regard of practitioners, for 

 wliom this work is iutendi d. 



We.shiU conclude, 1. That no worm can strict- 

 ly 1(3 said to be innate in the human body ; because 

 the verminous seed or germ is received into our sys- 

 tem, cither from the mother while the fetus is in 

 uiero, or from sucking mercenary nurses, (7^^) or from 

 the saliva of tlie nurse by the infant,(7t5) or finally 

 it may be insinuated into us with our food and 

 drink. In lliese ways, the eggs of worms are dis- 

 seminated througii our bodies. 2. That these seeds, 

 in whatever manner they may get into the human 

 1j »dy, are not developed unless deposited in parts 



