C >4 3 
tions, upon which to build a thorough Knowledge 
of the Atmofphere , and its EfFeds upon Mankind : 
And it is ealy to fee what great Advantage to this 
Part of Natural Knowledge mud arife from a Variety 
of Obfervations, made by different Men of Appli- 
cation and Judgment, upon one and the fame Sub- 
jed. Befides, in this Portion of our Defign may be 
included, what could not well without Perplexity be 
thrown into the Columns of the Diary, all the Mete- 
orological Appearances of the Aurora Borealis , Light- 
ning, Thunder, &c. together with Abftrads of the 
moft authentic Accounts of fuch Phenomena , as at 
any time in the preceding Month have been feen in 
different Parts of our own Country, or abroad. But 
this Article muft be left to every Gentleman's Judg- 
ment } it opening a fair Field for the moft happy 
Advancements of many Parts of Natural Knowledge. 
An Explanation of the Charaders in the 
HIS Line implies the Machine’s being at'the 
fame Degree as it was in the preceding Obfer- 
vation. 
This O Charader in the Spaces for the Force of 
the Wind implies a Calm. 
Note , i ft, None, but the cardinal and fubcardinal 
Points of the Compafs are commonly marked, unlefs 
in cafe of a Storm. 
2dly, In the Abftrad of the Bill of Mortality, which 
comes out on a Tuefday , the Account in each Week 
is to be compared from the Tuefday of the Week 
before, to the Tuefday in that Week where the Abf- 
trad is placed. 
DIARY 
April 
