( 454 ) 
deed they are a prefent remedy, if you can fo order them as by 
theit- helptomake a circirlation of the Air through the infeflcd 
place , otherwife they do hurt • and thofe groves wherein they 
are forced to break their rocks by the help of great fires, arefel- 
dome free from Damps. 
To the eleventh : Men ufually work in places infefted either 
by the fuhninating or other Damps, after they fuppofe ^the Vapour 
fpenc. . : . - . .... ; 
To the twelfth: Damps are commfan both iti ikfld w^t 
grounds ; but I cannoc tell in which moft. oi 
To the thirteentpj : Damps are obferved to be moft peftileritia!^ 
and tokiil thefuddainliefl:, that are in groves not ftirred for ma- 
ny years 5 cfpecially if fuch groves have formerly had great fires 
in them. 
To the fourteenth: The general opinion of our workmen is. 
That chere are fome Damps which kiil by reafon of the noyfome 
fteam, and others meerly by wantof air: Yv^hich latter opinion I 
have heard difal lowed by the more experienced fort. For they 
fay, there is no grove that wants Air, be it never fo deep 3 but the 
air ftagnating in very deep groves or pits, the groffer parts muft 
needs at length feparafethemfelves by their own weight, and fub- 
fidingto the bottom, there CO rrupr, and confequently get malig- 
nant qualities, efpccially in the Summer time, when the Sun pro- 
motes the fermentation. Befidestbis, the (landing Air being in a 
fhorc fime filled with the Vapours arifing from mens bodies and 
thefteamsof candles, and pafllng fo often through the Inngs of the 
workmen, is quickly rendred unfit for that ufe (whatfoever it is) 
to which refpiracion is accommodated ; And this they take to be 
the moft frequent caufe of ordinary Damps. 
To the fifteenth : Damps will often follow the water, and par- 
ticularly this fore of fiery damp, if I am rightly informed. 
An Account of fome Books. 
I, A Philofophical Difcourfe of EARTH, reUtmg to the Improve" 
mentof it for Vegetation and the Propagation of Plants: J.E- 
velyn Efq^i Fellow of the R.Society. London, printed for J. Mar- 
tyUfPrinter tothefaid Society. J,i6j6,ino^avo. 
^"T^His inftruflive and ufeful Difcourfe was prefented by the 
Ingenious Author thereof to the R.Society in two Leftures, 
'viz. /pril 19» and May 13. of this very Year. 
In it hefirft defcribeth what he means by Earth \ then endea- 
vors 
