[ sss 3 
whether by importing any Cattle from Flanders , I 
know not,- for furely there is too wide a Trad of 
Sea for any infedious Miafmata to be wafted 
over to that Part of the Country by the Winds ! 
This is certain, the ViJ'cera concerned in Refpiration 
are the Parts chiefly atfeded. Its Spreading here in 
England has been progreflive; and therefore one 
may reafonably think it is not conftitutionary in the 
Air, for then it ought to be univerfal every- where j 
but that it is contagious, and propagated by in- 
feded Cows being mixed with well Cows: There- 
fore the not buying in Calves, or ftrange Beafts, 
but every Farmer keeping his Herd by itfelf, muft be 
a great means of preventing the Propagation of it : 
And houflng the Cows a-nights may be a proper 
Prefervative againft ir. 
XIV. ExtraSl of a Letter from Mr. Arderon 
to Mr. Baker, F.R.S . giving an Account 
of the Weaver s Alarm, vulgo La rum. 
Read Dec, I2 -^TOTHING is more true, than that 
I 745- Neceflity is the Mother of Inven- 
tion ; among the many Inftances of which, the ufe- 
ful Contrivance I am going to deferibe may ferve 
as one remarkable Example. 
This little Apparatus goes commonly by the 
Name of the Weaver’s Larum , from its being chiefly 
or originally made ufe of by Perfons employed in 
that Trade, who have frequently Occafion to get 
up very early to their Work: And, as I am informed, 
Bbbb z Norwich 
