(«84) 
competent namber of Correfpondents do diligently profe- 
cute the Inquiries ( efpecially with J^^/tj/^^?/?^/, accommodated 
* with Mr. Hooks ingenioos additions) make men lomQ Luciferous 
difcoveries^ that poflibly we do not yet dream off. 
I know noCj whether it will be worth while to add, that fince 
I was oblig d to leave Londofiy I have been put upon fo many 
- lefler removes, that I have not been able to make BarofcopiccU 
Obfervations with fuch a conftancy, as Ihave wiflied, but, as 
far as I remember, the ^c\^filver has been for the moft part, 
fo high, as to invite me to take notice of it j and to defire you 
to do me the f?.vour to inquire among your correfpondents 
whether they have obferv'd the fame thing. For^ if they have, 
this lafting ( though not unintcr? 
^ This hith hen inmlredint0^ rupted ) Altitude of the SluicJ^'fiU 
aifdisfcmd, thatfeverdlAccu^ vir^ happening, when the Seafons 
rm and Curious ferfons { as the of the year have been extraordina- 
M4 Noble Prefident of the j^y^^.^ ^^^^ become a 
Brounker, Doftor Bealc, Mr. gneyancc, and to dry up, as one of 
Hook'&G. ) bAve chfervid the the late Gazettes mforms us, fome 
fame. {lutings nQ2LT Way mouth, thatufedto 
run conftantly) it may be worth 
inquiry, whether thefe obftinate Droughts, may not by cleav- 
ing of the ground too deep, and making it alfo in fome places 
more poroUs and as it were, fpungy, give a more copious Vent, 
thanis-ufualj to fubterraneal fteams, which adfcending into the 
Air,increafe the gravity of it» The inducements I have to pro- 
pofe this inquiry, I muft not now ftay to mention. But perhaps, 
if the Obfervation holds, it may prove not ufelefs in reference 
to fome Difeafes. 
Perhaps it will be necdiefs to put you in mind of dired:ing 
thofe Virtuofi^ that may dcfire your Inftruifiions about Barof- 
copes ^ to fet down in their Diary s not only the day of the month, 
and the hour of the day, when the Mwz/rw height is taken, 
but ( in a diftind: f<?toW) the weather,, efpecially the Wiads, 
both as to the Quarters, whence they blow ( though that be 
not always fo eafy nor necefTary, ) and as to the Violence or 
Remifncfs, wherewith they blow.Forjthough it be more difScuIr, 
than 
