[.78] 
thenceforth the ablative part exceeding, tk^ipofitive ) it 
will defcend. .ni. i i 
45. In an Horizontal or OhKque projeftiofl; having 
taken ^^-—^f in the line of Projeftion, and thence ( at the. 
n ^ 
Angle given ) — "^^"^"^ ^ in the line of Defcent ; tii^ 
point in the Curve anfwering to thele, is tlie place of the' 
Projefl: anfwering to that moment. 
46. I am aware of fome Obje£tions to be made, whe- 
ther to fome points of the Procefs, or to fom^ of the Siip-^ 
ppfitions. But I faw not well how to wave it, without 
making the Computation much more perplexed, - And in 
a matter fb nice, and which muft depend upon Phyfical 
Obfervations, t'will be hard to attain fiich accuracy as not 
to ftand in need of fome allowances. . . : > ii ' 
47. Somewhat might have been further added to di- 
rect the Experiments fiiggefted at IT 21. and 31. But 
that may be done at leifure, after deliberation had, which 
way to attempt the Experiment. . , . 
48. Thehke is to be faid of the'"difFereht refiftentie' 
which different Bodies rpay meet with m f the , {m\^^ -Medi^ 
urn, according to their different Gravities ( ext^rtfiYcly or 
intenfively confidered } and their differerit figures "ffid Po- 
fitions in Motion. Whereof we have hitherto taken no. 
account ; but fuppofed them,, as to ajl jthefe, t;9^ be alike 
Voft'jcrqt, 
49. The computation in ^.41, 42, 43, may ( if that be 
alio defired j be thus reprefented % Lines and Spaces. The 
Ablatives it^m a^mm &:c. f being the fame with the firft 
Coluijirr taken backward ) are fitlj repreftnted by the feg> 
ments ofA/jF(^ beginning at A^/ in Figure IV.and V. and 
therefore by Parallelograms on thcfe Bales, aflliming the 
common hight of J? A, or lA^ Q^: the Aggtegate of which 
