Hence LM 6036. 2. 
In the tivelfth Triangle LMN, to find LR 
Angles <j^jqL=29* 28. 20. 
^ T. F. 
The Side LM 6036. 2. 
Hence LN 1069 i. e. 
In the thirteenth Triangle ILN, to find NI. 
Thefum oftbe Ang!.IKL,KLM,MLN,raken from 36o5there remains 
Angle ILN=i 1 9^ 3 2'. 4^"- 
Thus, the Lineof Diftance, EN,being,as harhbeen faid,divided 
into threeiinequal parts, EG,GI, IN, themeaftires of all three are 
found by this Sca!e of Triangles. _ j 
Now then, reaflfuniing what hath been already difcovejr 'd by 
the help of thefe Triangles, and finding, that 
Toiifes. 
EG was in let^gth 3 iSV 7- 
GI i755;7^[? bnHoi\aiH 
IN 18905. ■ V .'>e=^ah ; 
Thefe added together, make the length of EN, whidMstte Lirie of 
Di ft ance bee w een Mdvoyfin and Sourdon^^ viz. 6 S j § ' 
Now to continue this meafure from Sourdvh to ^mie^sX^hich is 
the bufinefs of the feventh Article, undertaketi to the end that Fer- 
nel'm his account might be liquidated,whetber it were true ortio;) 
you muft, for the attaining it, mak^ uf? of the "DMp^m of Fig. 2; 
where Pv. ftands for the Steeple of Sr. ^^hys in M^Tftdidi^r T. is 
a Tree upon the Hill of Mareuil 5 V, is the Lantern of Nvjire Dame 
of Amiens, 
To find the diftance NV, you mud look" back upon NLM, the 
laft Triangle of Fig. r, and fee, how it is'difpofed in Fig.3^ where 
in the Triangle LMR, 
T. F. 
10691. o. 
11186. 4. 
18905. ©♦ 
Hence IN 
The 
