44 2 Af/\ small’s Obfervatlons 
way to Mahon, a diftance of two miles, and that you 
were under a necelTity of going to Mahon in the 
evening ; would you expedt to be ferenaded on this rock 
with the croaking of frogs all the way you went? This 
literally is the cafe. The gardens on each fide the road 
are fo much watered, that the frogs, bred in the citterns 
which contain the water, fpread and enjoy themfelves 
around, and frequently take up their abode in trees. 
This thews that even the trees abound much in watery 
juices, feeing the exhalations arifing from them yield 
an atmofphere agreeable to the frogs. Where land is 
thus abundantly watered and clofely planted with fuc- 
culent vegetables, many parts of thefe vegetables, as well 
as the infers which feed on them, will be liable to pu- 
trify ; and a putrid vapour may be thence exhaled in the 
evening efpecially, and during the night, when there 
leldom is wind to carry them off. Wherever the inha- 
bitants can find a proper depth of mould, within a con- 
venient diftance of a market, fo many fources of putrid 
exhalations are formed. 
Let me give an inftance, to lhew that this opinion is 
not merely ideal. On the North-fide of St. Philip’s there 
is a road, bounded on the North by a wall, called the 
Line-wall: Dr. huck muft remember it and the envi- 
rons. Along and near that wall there are many gardens, 
which thus fend forth unhealthy vapours ; and the effect 
is, that the houfes on the South-fide of that road, though 
facing the North, and thereby, one would think, the 
healthier, are called Rotten-row, their unhealthinefs 
being 
