( 368 ) 
ikfr. FlamfteadsL^^/^r^j/JuIy 24. 1^75. to the Fublifher, re^ 
lating to another^ pint id in NumA 10. of thefe Tiralfs^concernr 
ing M. Horraxes hun/ir S'^fieme. 
1 Have never before troubled you on the like occafion, whioh 
makes me hope, you will pardon this, which I write with no 
fiiiall reluftancy : Nor had I now adventured to concern you 
with it, if I had not found it frequently the fubjeft of the 
Tranjaoifom ^ to vindicate good Inventions to their proper Au- 
thors. ^J^; i ■* 
The vu!gaHy^recifiv'e<3 Syjlemes, though as little agree- 
able to Nature, as the Heavens, were entertained from one Aftro- 
nouier to another with little alterations^ from the Noble lycbo 
rothe Author of the Caroline tables: But when I had found by 
niany curious and careful meafuresof the Moons dimeters^ that 
the Heavens would never admit thofe Hypothefes, which made 
the diameter of the Perigeon-Mbon in the Quadratures larger 
than the Full Moon on the Perigee ; and that only the Syfime of 
Mr. Horrox^ which I had found in Mr. Crakrees ktters ^ would 
reprefent it as obftrved broadeft at Full ; and afterwards that it 
would accord well with fome Obfervations to which the Vulgar 
Tables agreed not within.- of a degree: I thought, it might be 
worth my Jabour to adorn it with Numbers^ th^t it might be fit 
for trial, as foon as it appeared in publick, to which I added an 
explication to be found in the Edition of his poflhumous 
works. This Syfteme has been well approved of by feveral good 
AQronomers^ and Mr. Street hasefteemed it fo good, that he 
has printed a figure of it with the defcription of his Planetary 
inftnunenr; bur without acknowledging the proper Author, or 
fo much as naming him more then cnce^ and then in fuch tenr.s, as 
may perfuade any perfon not well acquainted with MrMorrox his 
works, that he was but fome inconfiderable Aftronomer, and 
Mr. Streets print a clear diiTerent Syfteme. ,//Zf, faith he, being 
fcmewhat different from the limitations of the Theory of Uotrox and 
Tables therewith fublifht. This obliged me when I found it only 
