88 On Cohesion. 



3 X l-69214=5-07642 3 x l-46613=4-39839 



2 X 1-0.)5Q0 =2-11 OOP 2x0-86279 = 1-72558 



Log. i^a^ 7-18642 Log. c' ^^ 6-12397 



therefore, as Log, c^ ¥ : Log. d^ a' : : 6-12397 : 7' 18642 : : 

 Log. 1 : Log. 1 1-5464 .*. c^ b': d^ a^ : : I :l 1*5464 : : gravities 

 of particles of lead : gravities of particles of tin, or of masses 

 of lead to masses of tin containing equal numbers of particles. 

 (Cor. 2d.) 



Example 2d, — Let it be required to find the specific gravity 

 and corpuscular attraction of a compound body formed by melting 

 together masses of lead and tin containing equal numbers of 

 particles. 



Problem II. — "^ ' ° : 1 : : spec.grav. comp. :spec, 



] ,_f_^|' ' grav. lead. 



By last exami)lc, 



c b 



~l x^l =11-5464 1 1-f-lfxZ]' 



V-, „^„^ . i^_^,^_.^ 1-2-5464 



17-97 = '^^^^ 



■^1 =^7-97 J '+ — 



.'. -6615 : 1 : : spec, of comp. : spec. grav. lead .-. 11.3523 x 

 •6615 = 7-3354645= spec, gravity of composition. 



ProblemIII. — As- J"; 7 7 '^'' cohesion of comp. : co- 

 1 + J!l!ll \-T hesion of lead. 



L^ bJ I 



Here, as before, i^= 11-5464. 1 + --- = 18-97. Log. 



' c-i b- c' b' O 



18-97=1-27807 x f = •85204 = Log. l + ^*=Log.7-113 



• ^l!"' = i^'o-iJH — l-jgs ,•_ cohesion of composition 



, . rf-^o^ls. 7-113 to cohesion of lead as : I : 1-763. 



C3 ('3 



Example 3d. — Let it be required to find the specific gravity 

 and corpuscular attraction of a compound formed by melting to- 

 gether lead and tin in the proportion of 11-5 particles of the 

 former to 1 of the latter*. 



Problem IV. — As — iP^-iT^' ^ '• • spec, grav, comp.: spec. 

 '+~^~ grav. lead. 



* Or equal weights of the two metals. See Example 1. 



Log. 



