484 Scientific Intelligence. 
the same whether the camphol be right or left, having the con- 
stant fusing point of 226°-227°. By the action of alcoholic bok 
ash it splits into camphol and pomenine carbonate. Bratt 
Chim., I, xli, a3, April, 1884 G. 
this Cat at the boiling point. ‘For this purpose a U-tube 
was employed, the two sides of different diameters, hung in the 
_ vapor of the liquid with which it was filled. From the differ- 
ence of level in the two legs, the capillary constant was readily 
calculated. Beside this value, which the author represents by @, 
_ he uses $a’s to represent the weight of the raised liquid for unit 
length of the contact line, where ¢ is bis specific gravity of the 
liquid. If m= the molecular weight, — — =v, the molecular vol- 
4a’s =i 
m 
: 
raised per unit length of the contact line between the liquid and 
the wall of the solid. Since the value of N is small, the author 
multiplies it by 1000. The results of the measurements are given 
or 60 organic liquids, water being first_measured. For this 
liquid, il _ found to ce 15090 at 8°9°. Hexane gives «’=4" 514, 
ume, and —— ot os eee the relative number of molecules 
ha’s= and N= 16-1 at the boiling point, 68:1 For 
belies ‘she valu are, a "= 4495, $a7s==1°710, and N=162 
at 135°9°. ss de socks, a = 4°782, 4a" $=1°765 and N=38"4 at 
78°, ete. aring now together chemically analogous bodies, 
the values of a and of N are closely similar. Thus isobutyl- 
alcohol, ethyl formate and ether, bodies which have different 
the — ae die fatty series those with thee highest boiling 
raised sole cules e the converse holds with the aromatic 
st ,n chose’ wi betlosens be compared which give age 
cally the same e value for N, as for example 16, we have h oe 
» BIV- 
16°0, 15°9, 16 pach 16: 2, and compound etiers of the formula 
es giving 15°8, 15°6, 15-6, 15-9 and 15-7. Now ©,H = 
s C 
©; less ‘and H, more than .H,,. Hence, relatively to the 
stant N, C.=H, C.H,, has C, more and O, less than CH,05 
and therefore C, groups give the same results 
_ From the above it follows that Ca. om =H,. From dime 
_ thyl-acetal and chloroform it appea Cl=H,. These values 
‘enab 
e us to substitute a certain senor or hydrogen atoms fon 
