viii The Preface. 
inoft advifedble to print the?n^ with many 
other Experiments, in another Volume > 
which, God willing, I purpofe to do in a 
little time. For which reafon I call this 
the firft Volume $ and have in this new Edi- 
tion added the general Title of Statical Ef- 
fay s, as moft fuitable to the fever al SubjeCls 
of both Volumes . 
Whereas fome complain that they do not 
underftand the fignification of thofe Jhort 
figns or characters, 'which are here made 
ufe of in many of the calculations, and which 
are ttfual in Algebra 5 this mark -\~ fgnifes 
more, or to be added to. Thus page 1 8 , 
line 4, 6 ounces -f- 240 grains, is as much 
as to fay, 6 ounces more by, or to be ad- 
ded to 240 grains. And in line 16, of the 
fame page , this mark x or crofs fignifies 
multiplied by 5 the two floort parallel lines 
fignify equal to; thus 1820 x 4 = 7280 : 1, 
is as much as to fay, 1820 multiplied by 4 
equal to 7280 is to 1. 
THE 
