OF WINDS. 263 



where they begin, do at first blow but softly, which after 

 ward grow stronger and increase in their progress like unto 

 rivers. 



5. There are some places in the sea, and some lakes also 

 which swell extremely when there is no wind stirring, 

 which apparently proceeds from some subterraneal wind. 



6. There is great quantity of subterraneal spirit required 

 to shake or cleav 7 e the earth ; less will serve turn for the 

 raising of water. Wherefore earthquakes come but seldom, 

 risings and swellings of waters are more frequent. 



7. Likewise it is everywhere taken notice of that waters 

 do somewhat swell and rise before tempests. 



8. The weak subterraneal spirit which is breathed out 

 scatteringly is not perceived upon the earth until it be 

 gathered into wind, by reason the earth is full of pores; 

 but when it issues from under the water, it is presently 

 perceived (by reason of the water s continuity) by some 

 manner swelling. 



9. We resolved before that in cavernous and denny places 

 there were attendant winds ; insomuch that those winds 

 seem to have their local beginnings out of the earth. 



10. In great and rocky hills winds are found to breathe 

 sooner (namely, before they be perceived in the valleys), 

 and more frequently (namely, when it is calm weather in 

 the valleys), but all mountains and rocks are cavernous 

 and hollow. 



11. In Wales, in the county of Denbigh, a mountainous 

 and rocky country, out of certain caves (as Gilbertus re- 

 lateth) are such vehement eruptions of wind, that clothes 

 or linen laid out there upon any occasion, are blown up, 

 and carried a great way up into the air. 



12. In Aber Barry, near Severn in Wales, in a rocky 

 cliff, are certain holes, to which if you lay your ear, you 

 shall hear divers sounds and murmurs of winds under 

 ground. 



An indirect experiment. 



Acosta hath observed thatxthe towns of Pla*ta and Potosi, 

 in Peru, are not far distant one from the other, and both 

 situated upon a high and hilly ground, so that they differ 

 not in that ; and yet Potosi hath a cold and winter-like air, 

 and Plata hath a mild and spring-like temperature, which 

 difference it seems may be attributed to the silver mines 

 which are near Potosi; which showeth that there are breath 

 ing places of the earth, as in relation to hot and cold. 



13. If the earth be the first cold thing, according to 



